Question

Find the circumference of a circle with radius, r =20.5m. Give your answer in terms of pi

Answer 1

Circumference Formula: 2pi x r

Radius = 20.5

Plug it in:

2(3.14) x 20.5

6.28 x 20.5 = 128.74

Then, convert to pi terms.

128.74 = 41 pi

Therefore the circumference of a circle with a radius of 20.5m is 41pi.