Radius = square root of (area/pi) Circumference = 2*pi*radius
by timesing the circumference by pie
Radius = circumference/pi
2 x pi x radius
Divide its circumference by 2*pi which will give the radius of the circle. Area of the circle then is pi*radius squared
Divide the circumference by (2*pi)
Radius = square root of (area/pi) Circumference = 2*pi*radius
Circumference = 2*pi*radius So Radius = Circumference/(2*pi)
by timesing the circumference by pie
Radius = Circumference/(2*pi)
Radius = circumference/pi
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The Perimeter of a circle is it's circumference. And the circumference is the diameter times pi. So to find the area, divide the circumference by pi, and get the diameter. Then divide the diameter by 2, to get the radius. Then multiply the radius times itself, and multiply that by pi.
You can not find the circumference when only area is given. you need other details relating to shape. minimum parameter should be provided to find the required parameter.
2 x pi x radius
Divide its circumference by 2*pi which will give the radius of the circle. Area of the circle then is pi*radius squared
The equation for finding the circumference of a circle is diameter times pi so reverse it to circumference divided by pi which leaves the diameter. The diameter is twice as big as the radius so divide the diameter by 2 and you will find the radius.