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Q: Formula for the radius of a circle?

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The formula for the area of a circle is pi times the radius squared. The formula for the circumference of a circle is two times pi times the radius.

Area of a circle = pi*radius2 Circumference of a circle = 2*pi*radius or diameter*pi Diameter of a circle = 2*radius

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.

same as for a whole circle

-- 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.

Related questions

The formula for the area of a circle is pi times the radius squared. The formula for the circumference of a circle is two times pi times the radius.

radius = diameter/2

radius = diameter/2.

If you are given the radius of the circle, you can use the formula: diameter = 2*radius If you are given the circumference of the circle, you can use the formula: diameter = circumference/pi

The formula to get the area of a circle ("R" being the radius of the circle). Radius means the distance from the center of the circle to the edge.It means pi times radius squared which is the formula for finding the area of a circle.

The answer depends on the radius of what! The formula for a circle or sphere are different. The answer also depends on what information is available about the circle or sphere.

Area of circle = pi*(radius)2

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

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 .

Area of a circle = pi*radius2 Circumference of a circle = 2*pi*radius or diameter*pi Diameter of a circle = 2*radius

radius = 1/2 diameter

Area of a circle = pi*radius squared Circumference of a circle = 2*pi*radius or diameter*pi

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