It's pretty effortless - if we know that the radius = 2, and π= 3.14, we just need to follow the equation below: Quarter circle area = (π × r²)/ 4. Quarter circle area = (π × 2²)/ 4. Quarter circle area = (π × 4)/ 4. Quarter circle area = π. We already know the answer: the quarter circle area with the radius of 2 equals π!Review how to find the area of a circle with a radius of 5 cm using the formula A = pi x radius^2.There are two types of circle segments: minor segment ; major segment; The primary difference between the minor and major segments is that the major segment has a greater area compared to the minor segment.. The formula to determine the area of the shaded segment of the circle can be written as radians or degrees.Use this calculator to easily calculate the area of a circle, given its radius in any metric. Learn the formula, the history and the applications of circle geometry with examples and …Let's break the area into two parts: Part A is a square: Area of A = a 2 = 20m × 20m = 400m 2. Part B is a triangle. Viewed sideways it has a base of 20m and a height of 14m. Area of B = ½b × h = ½ × 20m × 14m = 140m 2. So the total area is: Area = Area of A + Area of B = 400m 2 + 140m 2 = 540m 2. Sam earns $0.10 per square meter. Solution: Given, radius = 20 units and length of an arc of a sector of circle = 8 units. Area of sector of circle = (lr)/2 = (8 × 20)/2 = 80 square units. Example 3: Find the perimeter of the sector of a circle whose radius is 8 units and a circular arc makes an angle of 30° at the center. Use π = 3.14. Learn how crop circles can be made and how researchers are trying to separate the supernatural from the scientific. Advertisement The sun sets on a field in southern England. When ...Work out the area of a circle that has a radius of 7 m. Give your answer in terms of pi. All you need to do is substitute 7 for r in A = π * r². A = π * r². A = π * 7². A = π * (7 * 7) A = π * 49. A = 49π. So the final answer is 49π m2 (put the number before pi and put your answer in terms of the relevant units squared).Examples of finding the area of a circle. We will use the following formula to find the area of any circle. Notice that this formula uses the radius, so we will have to convert when we are given the diameter instead. Let’s look at both cases. Example (given radius) Find the area of a circle with a radius of 5 meters. SolutionA circle has a diameter of 32 cm, find the area of a quarter circle. Solution: Diameter of circle = 32 cm. Area of a quarter circle = πd 2 /16 = 22/7 × 1/16 × 32 2 = 201.14 cm 2. Example: A goat is tied to one corner of a square field. The length of the rope to which the goat is tied is 2m. Find how much area is available for the goat to graze.Figure 1: Segment of a Circle Derivation. In fig. 1, if ∠AOB = θ (in degrees), then the area of the sector AOBC (A sector AOBC) is given by the formula; (A sector AOBC) = θ/360° × πr 2. Let the area of ΔAOB be A ΔAOB. So, the area of the segment ABC (A segment ABC) is given by. (A segment ABC) = (A sector AOBC) – A ΔAOB. Two objects are congruent if they have the same shape, dimensions and orientation. Congruent circles are circles that are equal in terms of radius, diameter, circumference and surf...1. Set up the formula . In the formula, r = the length of the radius, and θ "Theta" = the degrees in the central angle of the sector. [1] Remember, the area of a circle is. π r 2 {\displaystyle \pi r^ {2}} When finding the area of a sector, you are really just calculating the area of the whole circle, and then multiplying by the fraction of ...If you’re looking to enhance the beauty and functionality of your outdoor space, consider using circle paving sets. These versatile and durable paving materials offer numerous bene...In this example, you will learn about C++ program to find area of the circle with and without using the function. Formula to find area of the circle: Area_circle = Π * r * r. where, mathematical value of Π is 3.14159. Let’s calculate the are of the circle using two methods.In this example, you will learn about C++ program to find area of the circle with and without using the function. Formula to find area of the circle: Area_circle = Π * r * r. where, mathematical value of Π is 3.14159. Let’s calculate the are of the circle using two methods.Who do you trust? Ideally, family, friends and co-workers in our inner circles would be first among those to w Who do you trust? Ideally, family, friends and co-workers in our inne...Authentic Circle is the loyalty program at Miraval Resorts & Spas, a luxury, adults-only, all-inclusive Hyatt brand that focuses on wellness. We may be compensated when you click o...Jun 22, 2022 · Code Explanation: The formula used to calculate the circle area: π * r * r. Where, r is the radius and π is the mathematical constant Pi. We will take the value of radius from the user as input. For π, we can either define a variable and assign it up to a specific decimal place or we can use Math.PI constant that is available in C#. 00:00:20 – Formulas for finding the Area of a Circle, Area of a Sector and Area of a Segment; 00:04:37 – Find the area of the circle or sector (Examples #1-4) Exclusive Content for Member’s Only ; 00:12:24 – Find the area of the semicircle, sector or segment (Examples #5-9) 00:34:45 – Find the area of the shaded region (Examples #10 …Course: 7th grade > Unit 9. Lesson 1: Area and circumference of circles. Geometry FAQ. Radius, diameter, circumference & π. Labeling parts of a circle. Radius, diameter, & circumference. Radius and diameter. Radius & diameter from circumference. Relating circumference and area.Mar 1, 2022 · Welcome to How to Find the Area of a Circle with Mr. J! Need help with how to calculate the area of a circle? You're in the right place!Whether you're just s... We can calculate the diameter by multiplying the radius by 2: d = r * 2. If the circumference is known: The diameter can also be calculated using the circumference: d = c / π. If the area is known: The formula to calculate the diameter from the …The area of a circle is the number of square units inside that circle. If each square in the circle to the left has an area of 1 cm 2, you could count the total number of squares to get the area of this circle. Thus, if there were a total of 28.26 squares, the area of this circle would be 28.26 cm 2 However, it is easier to use one of the ...The equation for the area of a circle is: A = π r 2. A = π ⋅ 8 2. A = π ⋅ 64. We can stop here and write our answer as 64 π . Or we can plug in 3.14 for π and multiply. A = 3.14 ⋅ 64. A = 200.96 square units. The area of the circle is 64 π square units or 200.96 square units. Jul 5, 2010 · Visit https://www.MathHelp.com . This lesson covers the area of a circle. Students learn that the formula for the area of a circl ...more ...more Fast-forward to better TV Skip the cable setup... The area of a circle is the region occupied by the circle in the two-dimensional plane. We can easily determine this area using the formula A=πr², where r is the length of the radius of the circle and where π is a mathematical constant with an approximate value of 3.14.. Here, we will explore the area of a circle in more detail.Examples of finding the area of a circle. We will use the following formula to find the area of any circle. Notice that this formula uses the radius, so we will have to convert when we are given the diameter instead. Let’s look at both cases. Example (given radius) Find the area of a circle with a radius of 5 meters. Solution Area. If you’re asked to find the area of a circle, use this formula: a=πr 2; Arc. When measuring the circumference of the arc of a circle, you will need to take the arc degree and divide it by 360 (the total number of degrees in a circle). Then you need to multiply that by pi and the diameter of the circle. You can use the formula below:We detail the Circle K cash back policy (including potential limits, fees, and more), plus other gas stations that do cash back. You can typically get up to $40 cash back at Circle...Our surface area calculator can find the surface area of seven different solids. The formula depends on the type of solid. Surface area of a sphere: A = 4πr², where r stands for the radius of the sphere. Surface area of a cube: A = 6a², where a is the side length. Surface area of a cylinder: A = 2πr² + 2πrh, where r is the radius and h is the …Jan 30, 2024 · To find the area of a circle from the circumference, follow these steps: Divide the circumference by π. Divide the result by 2 to get the circle's radius. Multiply the radius by itself to get its square. Multiply the square by π, or 3.14 for an estimation. You found the circle's area from the circumference. Medicine Matters Sharing successes, challenges and daily happenings in the Department of Medicine ARTICLE: Complex decay dynamics of HIV virions, intact and defective proviruses, a...The area of a circle is given by A=πr^2, where π is the constant approximately equal to 3.14, and r is the radius of the circle. The radius r is the distance from the center of the circle to the edge of the circle. The diameter of the circle is double the radius; it’s the distance from one side of tUsing the formula for the area of an equilateral triangle and side length 10: The length and width of the rectangle are 10 in and 4 in respectively, so its area is. A = 10×4 = 40. The area of the semi-circle is one-half the area of a circle. The semi-circle has a radius of 5 and its area can be found by halving the area formula of a circle:Explore the formula for the area of a circle, by cutting it into sectors and rearranging the sectors to form a figure close to a parallelogram. By in…The formula to calculate the area of a circle is: A = π x r 2. where... A = area of circle. π = 3.141592654. r = radius of circle.The area of a circle is the region occupied by the circle in the two-dimensional plane. We can easily determine this area using the formula A=πr², where r is the length of the radius of the circle and where π is a mathematical constant with an approximate value of 3.14.. Here, we will explore the area of a circle in more detail.We are given the following triangle with sides equal to 50 cm, 35 cm and 40 cm. We want to find area of circle inscribed in this triangle. The area of circle = So, if we can find the radius of circle, we can find its area. We have one relation among semi-perimeter of triangle and the radius of circle inscribed in such a triangle which is:In geometry, the half circle is referred to as the semicircle. The semicircle is made by dividing a whole circle along its diameter. Alternatively, a semicircle could also be an op...Arc length and sector area. You can also find the area of a sector from its radius and its arc length. The formula for area, A, of a circle with radius, r, and arc length, L, is: A= (\frac {r\times L} {2}) A = ( 2r×L) Here is a three-tier birthday cake 6 inches tall with a diameter of 10 inches. Arc length and sector area.Learn how to calculate the area of a circle using the formula ππ (radius)2, where r is the radius of a circle. See practice problems, examples, diagrams and interactive applet to explore the relationship between the area …Examples of finding the area of a circle. We will use the following formula to find the area of any circle. Notice that this formula uses the radius, so we will have to convert when we are given the diameter instead. Let’s look at both cases. Example (given radius) Find the area of a circle with a radius of 5 meters. Solution Example 2 — Find the area of a circle using the diameter of 32m. Give your answer correct to 1 decimal place. The radius is half the diameter, so: radius = diameter ÷ 2. radius = 32 ÷ 2. radius = 16m. Now, we can find the area using the original formula: Area = π × radius × radius. Area = π × 16 × 16.Visit https://www.MathHelp.com . This lesson covers the area of a circle. Students learn that the formula for the area of a circl ...more ...more Fast-forward to …3. If you know the area of the circle, divide the result by π and find its square root to get the radius; then multiply by 2 to get the diameter. This goes back to manipulating the formula for finding the area of a circle, A = πr 2, to get the diameter. You can transform this into r = √ (A/π) cm. [3]Showing loyalty to Princess Cruises just got more rewarding. Showing loyalty to Princess Cruises just got more rewarding. The California-based line on Thursday announced several ne...Circular segment. Here you can find the set of calculators related to circular segment: segment area calculator, arc length calculator, chord length calculator, height and perimeter of circular segment by radius and angle calculator. Circular segment - is an area of a "cut off" circle from the rest of the circle by a secant (chord).The formula for the area of a circle (A) using its radius r is as follows: A = πr 2 Example: A circle has a radius of 5 inches. Find the area of the circle. A = πr 2 A = 3.14 × (5 inches) 2Not long ago, the kids and I were bopping along to a Taylor Swift beat when my son paused and shouted over the song, “Wait. Did she just say ‘gay’?&am...Using the formula for the area of an equilateral triangle and side length 10: The length and width of the rectangle are 10 in and 4 in respectively, so its area is. A = 10×4 = 40. The area of the semi-circle is one-half the area of a circle. The semi-circle has a radius of 5 and its area can be found by halving the area formula of a circle:Circular segment. Here you can find the set of calculators related to circular segment: segment area calculator, arc length calculator, chord length calculator, height and perimeter of circular segment by radius and angle calculator. Circular segment - is an area of a "cut off" circle from the rest of the circle by a secant (chord).Jul 28, 2022 · Input : radius= 5 Output: Area of circle is : 78.55 Input : radius= 8 Output: Area of circle is : 201.08. As we know to calculate the area of a circle, the radius of the circle must be known, so if the radius of the circle is known, then the area of the circle can be calculated by using the formula: Area = 3.142*(radius)*(radius) Feb 9, 2021 ... The area of a circle, A, is π r2, where r is the radius of the circle. If you are given the radius of a circle, you can find its area. If ...This video explains how to find the area of a circle and goes through a few typical questions. This will help with key stage 3 maths and GCSE.Input : radius= 5 Output: Area of circle is : 78.55 Input : radius= 8 Output: Area of circle is : 201.08. As we know to calculate the area of a circle, the radius of the circle must be known, so if the radius of the circle is known, then the area of the circle can be calculated by using the formula: Area = 3.142*(radius)*(radius)Formula to Calculate Surface Area of a Circle. Example 1: Calculate the surface area of a circle whose radius is 21 cm. Therefore, the surface area of the circle is 1386 cm² . Example 2: Calculate the S.A of a circle if its diameter is 98cm. Hence, the area of the circle is 7,546cm 2.Many woodworking projects require drawing circles, which can cause some hesitation for do-it-yourselfers. Here's how to easily draw the perfect circle. Expert Advice On Improving Y...Who do you trust? Ideally, family, friends and co-workers in our inner circles would be first among those to w Who do you trust? Ideally, family, friends and co-workers in our inne...Two objects are congruent if they have the same shape, dimensions and orientation. Congruent circles are circles that are equal in terms of radius, diameter, circumference and surf...The formula for the area of a circle is pi multiplied by the radius of the circle squared. The radius of the circle is the length of a straight line stretching from the center of t...How To Find the Area of a Quarter Circle. Step 1: Note down the given radius or the diameter of the circle. Step 2: If the radius “r” is given, substitute the value of “r” in the formula π r 2 4. Step 3: If the diameter “d” is given, substitute the value of “d” in the formula π d 2 16. Step 4: Area is measured in square units.Use this calculator to easily calculate the area of a circle, given its radius in any metric. Learn the formula, the history and the applications of circle geometry with examples and …Methods for finding the Area of the Given Circle using Python. Method 1: Find the area of the given circle using the math module. import math as M. Radius = float (input ("Please enter the radius of the given circle: ")) area_of_the_circle = M.pi* Radius * Radius.If you’re looking to enhance the beauty and functionality of your outdoor space, consider using circle paving sets. These versatile and durable paving materials offer numerous bene...How the Calculator Works. Choose the area value: you can choose a whole number, decimal or fraction. Choose your units of measurement (default is none) Choose your desired accuracy (default is 2 decimal places) Click the Find Radius button. You will be shown the radius and diameter of the circle as a decimal to the required accuracy. The formula is given as. A ∆ = 1 2 b h. The approach we will take is first approximating the area using triangles, then using smaller and smaller triangles to better …Jun 22, 2022 · Code Explanation: The formula used to calculate the circle area: π * r * r. Where, r is the radius and π is the mathematical constant Pi. We will take the value of radius from the user as input. For π, we can either define a variable and assign it up to a specific decimal place or we can use Math.PI constant that is available in C#. s = 10 The area of the first square is 7 2 = 49 and the area of the second square is 10 2 = 100 , so we know that the area of the circle must be between 49 and 100 . That narrows …Area of Shapes Examples. Example 1: Find the area of the circular path whose radius is 7m. Solution: Given, radius of circular path, r = 7m. By the formula of area of circle, we know; A = π r 2. A = 22/7 x 7 x 7. A = 154 …It's pretty effortless - if we know that the radius = 2, and π= 3.14, we just need to follow the equation below: Quarter circle area = (π × r²)/ 4. Quarter circle area = (π × 2²)/ 4. Quarter circle area = (π × 4)/ 4. Quarter circle area = π. We already know the answer: the quarter circle area with the radius of 2 equals π!In order to find the total space enclosed by the sector, we use the area of a sector formula. The area of a sector can be calculated using the following formulas, Area of a Sector of Circle = (θ/360º) × πr 2, where, θ is the sector angle subtended by the arc at the center, in degrees, and 'r' is the radius of the circle.; Area of a Sector of Circle = 1/2 × r 2 θ, …It's pretty effortless - if we know that the radius = 2, and π= 3.14, we just need to follow the equation below: Quarter circle area = (π × r²)/ 4. Quarter circle area = (π × 2²)/ 4. Quarter circle area = (π × 4)/ 4. Quarter circle area = π. We already know the answer: the quarter circle area with the radius of 2 equals π!D. Russell. A three-dimensional circle is known as a sphere. In order to calculate either the surface area or the volume of a sphere, you need to know the radius (r).The radius is the distance from the center of the sphere to the edge and it is always the same, no matter which points on the sphere's edge you measure from.To find: Perimeter and area of circle. Given that, Radius, r = 5 cm and π = 3.14. As we know, the circumference (or) perimeter of a circle = 2πr units. The area of a circle = πr 2 square units. Now, substitute the values in the perimeter and area of circle formula, we get.The formula for the area of the circle is 𝑨 = π𝒓². To work out the area of a circle: Find the value of the radius. If the diameter is given, this must be halved. Substitute the value of ...There are two types of circle segments: minor segment ; major segment; The primary difference between the minor and major segments is that the major segment has a greater area compared to the minor segment.. The formula to determine the area of the shaded segment of the circle can be written as radians or degrees.The formula for finding the area of a circle is . In this formula, represents the radius of the circle. Since the question only gives us the measurement of the diameter of the circle, we must calculate the radius. In order to do this, we divide the diameter by . …Course: 7th grade > Unit 9. Lesson 1: Area and circumference of circles. Geometry FAQ. Radius, diameter, circumference & π. Labeling parts of a circle. Radius, diameter, & circumference. Radius and diameter. Radius & diameter from circumference. Relating circumference and area.To find the area of a circle, we need to find the radius first. The radius of the circle is half of the diamter which is half of 7 = 3.5 inches. Next we need to square the radius: 3.5 2 = 3.5 x 3.5 = 12.25 cm. Finally we need to multiply this amount by pi (π). So the area of this circle is π x r 2 = π x 12.25 cm.Mr. J will go through area of a circle examples and explain the steps of how to find the area of a circle. About Math with Mr. J: This channel offers instructional …Sep 26, 2022 · The product will give you the area of the circle, in square units. [4] For example: area = π ( 15.8404 ) {\displaystyle {\text {area}}=\pi (15.8404)} area = 49.764 {\displaystyle {\text {area}}=49.764} So, the area of a circle with a circumference of 25 centimeter (9.8 in) is about 49.764 square centimeters. Part 3. Area Of A Segment Of A Circle With Examples. Example 1: Find the area of the segment of a circle,given that the angle of the sector is 120º and the radius of the circle is 21 cm. (Take π = 22/7) Sol. Here, r = 21 cm and π = 120. ∴ Area of the segment. = { π 360 × θ − sin θ 2cos θ 2}r2. = {227 × 120 360 − sin 60o cos 60o}(21)2cm2.Calculate the area of a sector: A = r² × θ / 2 = 15² × π/4 / 2 = 88.36 cm². You can also use the arc length calculator to find the central angle or the circle's radius. Simply input any two values into the appropriate boxes and watch it conducting all calculations for you. Make sure to check out the equation of a circle calculator, too!Learn how to calculate the area of a circle using diameter or radius, and how to use the area of a circle calculator to find the surface area of a circle. Find out the formulas, the steps, and the applications of the area of a circle in mathematics and everyday life.Find the area of the full circle and divide it by two. The formula for finding the area of a full circle is πr 2, where "r" represents the radius of the circle.Since you're finding the area of a semi-circle, you'll …Use this calculator to easily calculate the area of a circle, given its radius in any metric. Learn the formula, the history and the applications of circle geometry with examples and …Learn how to calculate the area of a circle using the formula A = π𝒓², where π is a constant and 𝒓 is the radius. See examples, diagrams, practice questions and a quiz …To find the radius, r, of a cylinder from its surface area A, you must also know the cylinder's height, h:. Substitute the height h into the surface area of a cylinder equation:. A = 2πr² + 2πrh. Bring all terms in this equation to one side to get 2πr² + 2πrh - A = 0.Note that this is a quadratic equation in terms of r.. Solve this equation using the …Aug 28, 2012 ... The area of each polygon is given by An=2rsinθn212r√1−(sinθn2)2=r2sinθn2cosθn2. Then the area of the circle is given by limn→∞n ...Example 2. Find the area of the circle. Answer: Step 1: Identify the radius. Remember, the radius is the distance from the center to the outside - halfway across the circle. The 10 marks the diameter, not the radius. To find the radius, we need to take half of 10. r = 5. Step 2: Plug 5 into the formula. Step 3: Simplify.
Authentic Circle is the loyalty program at Miraval Resorts & Spas, a luxury, adults-only, all-inclusive Hyatt brand that focuses on wellness. We may be compensated when you click o.... The summer i turned pretty season 2
Learn how to calculate the area of a circle using radius, diameter, or circumference with a simple formula and examples. Find out how to use the area of a …You know the area of a circular sector OPR O P R is given by r21a 2 r 1 2 a 2 where a a is in radians of course. 1) Area of triangle OPO′ O P O ′ minus area of circular sector O′PS O ′ P S = area of sector OPS O P S. 2)Requested area = 2 ( r21a 2 r 1 2 a 2 minus area of sector OPS O P S) Share. Cite.Welcome to How to Find the Area of a Circle with Mr. J! Need help with finding the area of a circle? You're in the right place!Whether you're just starting o...Circular segment - is an area of a "cut off" circle from the rest of the circle by a secant (chord). On the picture: L - arc length h - height c - chord R - radius a - angle. If you know the radius and the angle, you may use the following formulas to calculate the remaining segment values: Circular segment formulas. Segment area: [1] Arc length ... 1. Get the radius of the circle from the user. 2. Calculate the area of the circle using the formula pi*r*r 3. Print the area of the circle, rounded to the desired precision. Time Complexity: O(1) The above program has no iterative statements, no function calls, and only performs input and output operations. Therefore, its time complexity is O(1).Visit https://www.MathHelp.com . This lesson covers the area of a circle. Students learn that the formula for the area of a circl ...more ...more Fast-forward to …Mar 1, 2022 · Welcome to How to Find the Area of a Circle with Mr. J! Need help with how to calculate the area of a circle? You're in the right place!Whether you're just s... STEP 4: Read the figure code into the variable fig_code. STEP 5: By using a switch statement, check the value of fig_code. STEP 6: If the fig_code is 1, then read the Radius of the Circle and calculate the Area using the formula 3.142*radius*radius, then Display the Area of the Circle as Area. STEP 7: If the fig_code is 2, then read the …First, work out the area of the whole circle by substituting the radius of 8cm into the formula for the area of the circle: A = π ×r². = π ×8². = 64π (leave the answer as an exact solution as this needs to be divided by 4). So all you need to do now is divide the answer by 4: Area of a quadrant = 64π ÷4 = 16π = 50.3 cm² to 3 ...A = πr 2. How to Find Area of Circle. Various steps required to find the area of the circle are given below: Step 1: Mark the radius of the circle. Step 2: Put the value of the radius in the formula A = πr 2, where r is the radius and π is the constant with a value of 3.14 (approx) Step 3: Obtained the answer in step 2 is the required area of the …We know that the general equation for a circle is ( x - h )^2 + ( y - k )^2 = r^2, where ( h, k ) is the center and r is the radius. So add 21 to both sides to get the constant term to the righthand side of the equation. x^2 + y^2 -4y = 21. Then complete the square for the y terms. x^2 + y^2 - 4y + 4 = 21 + 4. Then factor. Nov 30, 2023 · The formula for finding the area of a full circle is πr 2, where "r" represents the radius of the circle. Since you're finding the area of a semi-circle, you'll be looking for half of the area of a circle, which means you have to use the formula for finding the area of a semi-circle and then divide it by two. So, the formula you'll have to use ... In order to find the total space enclosed by the sector, we use the area of a sector formula. The area of a sector can be calculated using the following formulas, Area of a Sector of Circle = (θ/360º) × πr 2, where, θ is the sector angle subtended by the arc at the center, in degrees, and 'r' is the radius of the circle. The area of a circle is a fundamental concept in geometry. It is the measure of the region enclosed by a circle. The area of a circle can be calculated using the formula A = πr^2, where A represents the area and r represents the radius of the circle.The value of π is approximately 3.14159, a mathematical constant.The area of a circle is always …A circle of radius = 8.246 or diameter = 16.49 or circumference = 51.81 meters has an area of: 0.0002136 square kilometers (km²) 213.6 square meters (m²) 2136000 square centimeters (cm²) 2.136 × 10 8 square millimeters (mm²) 8.24714E-5 square miles (mi²)Note: If you have the diameter of a circle, you can use it to find the area of that circle. Just plug that value into the formula for the area of a circle and solve. Watch this tutorial to see how it's done!AboutTranscript. The area of a circle is pi times the radius squared (A = π r²). Learn how to use this formula to find the area of a circle when given the diameter. Created by Sal Khan and Monterey Institute for Technology and Education. Solution: Given, radius = 20 units and length of an arc of a sector of circle = 8 units. Area of sector of circle = (lr)/2 = (8 × 20)/2 = 80 square units. Example 3: Find the perimeter of the sector of a circle whose radius is 8 units and a circular arc makes an angle of 30° at the center. Use π = 3.14. We detail the Circle K cash back policy (including potential limits, fees, and more), plus other gas stations that do cash back. You can typically get up to $40 cash back at Circle...Area. The area of a circle is the total area that is bounded by the circumference. Think of the area of the circle as if you draw the circumference and fill in the area within the circle with paint or crayons. The formulas for the area of a circle are: A = π * r^2. In this formula, "A" stands for the area, "r" represents the radius, π is pi ...In order to find the total space enclosed by the sector, we use the area of a sector formula. The area of a sector can be calculated using the following formulas, Area of a Sector of Circle = (θ/360º) × πr 2, where, θ is the sector angle subtended by the arc at the center, in degrees, and 'r' is the radius of the circle. .