Question

The diameter of a circle is 20 cm. Find its circumference in terms of � π.

Answer 1

Explanation:

Diameter is twice the radius

If diameter is 20 cm, then radius is 10cm

The formula for circumference is C=2(pi)r

Plug 10 in for r into the formula and solve for C:

C = 2(pi)(10)

C = 20pi

In terms of circumference, it is 20pi