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A = pi x radius2

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Q: What is the formula to find a area of a circle when given radius?
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A circle has radius r what is the formula for the area of the circle?

For a circle or radius r, the area is given by: area = {pi}r2 (ie pi times the radius squared)


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.


Radious formula for a cicrle?

It is not clear whether you want the formula of some aspect (area or circumference) of a circle when given its radius or a formula for its radius when given some characteristic measure of the circle.


What is the formula for area of the circle?

The formula for area of a circle is TTr2.This means that we multiply 3.14(the rounded off nunber for pi) by the radius and radius(3.14xradiusxradius).If the diameter is given,divide it by 2 to get the radius.


What is the area of a 6.2 radius circle?

The area of a circle is given by the formula A = πr^2, where A represents the area and r represents the radius. Plugging in the given radius of 6.2 into the formula, we have A = π(6.2)^2. Evaluating this expression gives an area of approximately 120.79 square units.


Formula for finding radius of a circle?

c=TT R Given the area, the radius = square root (area / Pi). Given the circumference, the radius = circumf/ 2Pi.


What is the formula to find the area of a circle with the radius given?

A = pi x radius squared where pi = 3.14


What is the area of a circle with a radius of 21 feet?

Using 3.14 as Pi the area of circle is: 1384.74


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

it is square root of the area divided by pi


Formula and result of area of circle?

The formula for the area of a circle is: Area = (pi) x (Radius)2 . When you know the radius of the circle and you use it to calculate the area of the circle, the result will be equal to (pi) x (Radius)2 .


What is formula for the area of a circle?

the formula for the area of a circle is 3.14 x radius squared


Why do you use the radius in the formula of finding the area of a circle?

Area of circle = pi*(radius)2