Question

The diameter of a circle is 4 feet. What is the circumference?

d=4 ft
Give the exact answer in simplest form.

I need the answers

Answer 1

4π ft

Explanation:

C = 2πr (Circumference formula for a circle)

diamater = 4, so diamter = 2 x radius, 4 = 2 x r , so r = 2

Use formula:

C = 2π(2) = 4π

4π ft (Exact answer)

Answer 2

Answer: 4π

Step-by-step explanation: C= 2πr; 2r=d; C=dπ; C=4π!