Area of a circle using the radius Given the radius of a circle, the formula for calculating the area of a circle states that: Area of a Circle = πr2 square units A = πr2 square unitsWhere A = the area of a circle. pi (π) = 22/7 or 3.14 and r = the radius of a circle...
To find the area of a circle with a given radius, we can use the formula: Area of a Circle = πr² Where: -π (pi) is a constant approximately equal to 3.14, - r is the radius of the circle. 1.Identify the radius: The radius given isr=√5cm. 2.Substitute the radius into t...
Example: find the area of a circle Task 1: Given the radius of a circle, find its area. For example, if the radius is 5 inches, then using the first area formula calculate π x 52 = 3.14159 x 25 = 78.54 sq in. Task 2: Find the area of a circle given its diameter is 12 cm...
//Java Program to find the area of a circle given the radius import java.util.Scanner; class AreaOfCircle { double area; void circle(double rad) { area= (22*rad*rad)/7; } } public class Main extends AreaOfCircle { public static void main(String args[]) { //Take input from the ...
To find the area of a circle, you take pi times the radius squared, or A = pi r^2. Using this formula, you can find the area of a circle if you know the radius -- or the diameter -- by plugging in your values and solving for A. Pi is approximated as 3.
圆的面积(Areaofacircle) Theapproximaterectangleisclosertotherectangle.The relationshipbetweentheteacherstoguidestudentstoanalyze andcomparethelengthandwidthoftherectanglewiththe originalradiusandcircumference,sothatstudentscansee theirown:halfthelengthofarectangleoftheapproximate equivalentofthecircumferenceofacircle,i....
The area of a circle with a radius of 3 cm is equal to the area of a square. What is the side length of the square? A. 3 cm B. 3π cm C. 3√π cm D. 9 cm 相关知识点: 试题来源: 解析 C。解析:圆的面积为π×3×3 = 9π平方厘米。设正方形边长为 a,则 a×a = 9π,...
25 Given that the area of a circle with radius 10 cm is equal to the area of a sector with centralangle 40°, then the radius of the sector iscm. 38. Given that the radius of a sector is r, with a central angle of n, the area of thissector is 反馈...
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.
Area of a Circle Area of a Circle Description: Complete the functioncircleAreaso that it will return the area of a circle with the givenradius. Round the returned number to two decimal places (except for Haskell). If the radius is not positive or not a number, returnfalse....