Question

What is the exact circumference of a circle that has a radius of 10 cm?

Answer 1

The exact circumference is 62.83 cm.

Answer 2

C = 20π cm

Explanation:

If you want the "exact circumference," use π instead of the usual approximation 3.14 or 3.14159.

Here the circumference is C = 2π(10 cm), or C = 20π cm.