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Q: What is the equation for finding the circumference of a circle from the radius?

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The equation for circumference is C=2(pi)(r) where C is the circumference and r is the radius. You can find the radius by plugging in the circumference into this equation and solving the equation.

the equation for the circumference of a circle is 2*radius*pi, or since the radius is half of the diameter 2*radius=diameter, we can simplify the equation to the circumference of a circle=diameter*pi

the equation for the circumference is Pi * double the radius which is 3.1416 * 15.5 * 2 The circumference of a circle with a radius of 15.5cm is 97.3cm.

2*pi*radius = perimeter or circumference of a circle radius = circumference/2*pi

The equation for circumference is 2(3.14)(r) or 3.14(d) where r=radius and d=diameter. The radius of a circle is half of the circumference, or the distance across the interior of a circle.

The equation for the circumference of a circle is pi times radius squared.

2x3.142xr

The equation for finding the circumference of a circle is diameter times pi so reverse it to circumference divided by pi which leaves the diameter. The diameter is twice as big as the radius so divide the diameter by 2 and you will find the radius.

To find the circumference of a circle, use the equation: Circumference = 2*π*radius so when the radius is r, the circumference is 2πr

Divide the circumference by 2*pi because 2*pi*radius = circumference

The equation for finding the circumference of a circle is C=2πr.C= Circumference.π= Pi (3.14).r= Radius.Therefore, C=2π(20), so C=125.66.

Circumference = 2 x pi x radius

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