Question

A circle has a radius of 10 mm. What is its circumference?

Answer 1

Answer: 20pi mm

Explanation:

The circumference of a circle is 2*pi*radius.

Therefore, the circumference is 2*pi*10mm = 20pi mm

Answer 2

Answer/s:

≈ 62.83 mm or 20π mm

Explanation:

We can use the following formula to solve:

C = 2πr

C = 2π(10)

C ≈ 62.83 mm

-> You can also end up at 20π if you need an "exact" answer