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How do you find area of a circle if you know the radius?

Anonymous

∙ 12y ago

Updated: 12/11/2022

Area of a circle = radius x radius x pi

"Pi" is a constant number and is equal to 3.14159265 (taken out to 8 decimal places) Usually just 3.14 is good. For more precision, 3.1416 is often used.

"Pi" is good for finding the area of any circle, anywhere.

Wiki User

∙ 12y ago

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Continue Learning about Math & Arithmetic

How do you find the radius and diameter of the circle if you know the area?

Area of Circle = pi (radius)2 So , using this formula we can find the radius and also the diameter. Diameter = 2(radius)

How do you find the radius if you know the area of a circle?

Radius is the square root of (area divided by pi).

How do you find the radius of the base in a cylinder?

It depends on the values you have. The base of a cylinder is a circle. If you know the circle's diameter, half it to find the radius. If you know the circle's circumference, divide by 2pi to find the radius. If you know the circle's area, divide by pi and take the square root to find the radius.

How do you find the radius of the circle if you know the area?

Area of a circle equals pi r2 Therefore the radius of a circle equals the square root of (area divided by pi).

What is the required piece of information tho find the area of a circle?

The only piece of information required to find the area of a circle is the radius of the circle. Once you know the radius of the circle, the area is simply the radius squared multiplied by pi (approximately 3.14).

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