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What is the formula for finding the radius of a circle when you have the circumference?
Divide the circumference by 2*pi because 2*pi*radius = circumference
What is a formula for calculating the radius of a circle when the circumference is known?
The way to find the circumference is either 2 x pi x r, or pi x d.So rearrange the formula:circumference = 2 x pi x rcircumference / 2 x pi = rSo take the circumference, and divide it by 2 pi and you have the radius.A:Using the formula for circumference which is 2(pi)r solve for r. Now you have radius = circumference/(2pi). The formula for area of a circle is (pi)r^2. Substituting r with circumference/(2pi) you get area = pi(circumference/(2pi))^2. When you simplify you get area = circumference^2/(4pi).
What is formula to figure the circumference of a circle?
Circumference = 2 x {pi} x radius = {pi} x diameter
Formula for circumference of a circle?
Circumference of a circle:Formula= diameter * pi (approx 3.14)
What is the formual for pi?
the formula for pi is the ratio of the circumference of a circle to the diameter of the circle
