Question

What is the circumference of the circle whose equation is (x − 9)2 + (y − 3)2 = 64?

Answer 1

C = 16pi or ≈50.24 units

Explanation:

(x − 9)^2 + (y − 3)^2 = 64

This equation is in the form

(x-h)^2 + (y-k)^2 = r^2

The radius is 8

The circumference is given by

C = 2*pi*r

C = 2*pi*8

C = 16 pi

Using 3.14 as an approximation for pi

C = 16(3.14)

C ≈50.24