Question

Find the area and the circumference of a circle with radius 9km.

Write your answers in terms of π, and be sure to include the correct units in your answers.

Answer 1

Area: 81*pi

Circumference: 18*pi

Explanation:

Area: 9^2= 81

So it would be 81*pi

Circumference: 9*2= 18

So it would be 18*pi

If you want the full area then it's 81*pi= 254.34

If you want the full circumference it's 18*pi= 56.55