The area of a circle is given by: pi multiplied by the square of the radius.
So if the radius is 15, the area is 225pi (225 is 15 squared)
using the equation Area = pi x radius squared 285.02
It's radius x radius x pi.
Area of a circle = (pi) (R2)R = radius of the circle = 1/2 of its diameter
Area of a circle = 3.14 * r2 Thus, radius, r = root of ( Area of a circle / 3.14 ) --------- equation 1 Circumference of circle = 2 * 3.14 * r Therefore, from (equation 1), Circumference = 2 * 3.14 * root of ( Area of a circle / 3.14 ). In a nutshell, first find the radius and then the circumference.
If you have the radius of the circle then just plug it into the equation which ispi x r2This equation is used to find the area of a circleSo if your radius is 5 then all you do is 52 and then multiply by piHope that helps.Jamz159
The equation for calculating the area of a circle is A r2, where A represents the area and r is the radius of the circle.
Equation for the area circle = pi x radius squared If the area is 144pi, then you need to find the square root of 144, which is 12. Therefore, radius = 12
using the equation Area = pi x radius squared 285.02
Area of a circle = pi*radius squared Circumference of a circle = 2*pi*radius or diameter*pi
It's radius x radius x pi.
π×(radius)2http:/www.mathwarehouse.com/geometry/circle/area-of-circle.php
Area of a circle = (pi) (R2)R = radius of the circle = 1/2 of its diameter
Area of a circle = pi*radius squared Circumference of a circle = 2*pi*radius or diameter*pi
You can certainly express the radius as a function of its area, yes. If the area is known, you can solve the formula for the area of the circle to uniquely get the radius. (The quadratic equation has two solutions; you will of course choose the positive solution for the radius.)
Area of a circle = 3.14 * r2 Thus, radius, r = root of ( Area of a circle / 3.14 ) --------- equation 1 Circumference of circle = 2 * 3.14 * r Therefore, from (equation 1), Circumference = 2 * 3.14 * root of ( Area of a circle / 3.14 ). In a nutshell, first find the radius and then the circumference.
The area of a circle is: pi times radius squared
Solve the equation for the area of the circle (area = pi x radius2) for radius. Multiply the radius by 2 to obtain the diameter.