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What is the formula to find the radius of a circle?

Anonymous

∙ 12y ago

Updated: 8/16/2019

From the diameter D

r = D/2

From the circumference C (C= pi *2r)

r = C/2pi

From the area A (A = pi r2)

r = sq rt (A/pi)

Wiki User

∙ 12y ago

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Related Questions

Formula for the radius of a circle?

Well to find the radius it is diameter/2.

How do you find the radius and what is the formula?

to find the radius you have to measer trow the circle then divid by 2

What is the formula to find a radius of a half circle?

same as for a whole circle

If the area of a circle is 201.06 then the circumference of the circle is?

The formula to find the circumference of a circle is C = 2πr, where r is the radius of the circle. To find the circumference, you first need to find the radius by using the formula for the area of a circle (A = πr^2). Given that the area is 201.06, you can solve for the radius. Once you have the radius, you can plug it into the formula C = 2πr to find the circumference.

What is the radius and the area of a circle?

The radius of a circle is the distance from the center to any point on the circle. The area is the space within the circle. The formula to find the area is πr2. r stands for the radius of the circle. If you want to find the radius, you can work backwards from the area or the circumference, which is the perimeter of the circle. The formula for circumference is 2πr.

What is the formula to find circumference when you are given the radius?

To find the circumference of a circle the formula is: 2*pi*radius or diameter*pi

Investigate the formula of the area of a circle?

The formula to find the area of a circle is pi x the radius squared.

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 of a circle when the area is given?

-- Take the formula for the area of the circle in terms of the radius . . . A = (pi) R2-- Solve that formula for 'R'. You'll then have a formula for the radius in terms of the area,which is exactly what you're looking for.

What is the formula to find area of circle?

The formula to find area is you do the radius squared times pi or 3.14

How do you Find The Perimeter of a Circle With Radius?

this is called finding the circumference. The formula is 2*pie*radius

How do you find the formula of area of a circle?

pi multiplied by the radius squared

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