Question

The circumference of a quarter is approximately 2.88 in.

What is a quarter’s diameter?

(Use 3 for pi)

Answer 1

Find circumference of circle

• 4(2.88)
• 11.52in

Now

• 2πr=11.52
• r=11.52/6.28
• r=1.92in

So

diameter=3.84in

Answer 2

• 3.84 in

Explanation:

The circumference of a quarter is 2.88 in:

• C/4 = 2.88
• C = 4*2.88
• C = 11.52 in

Circumference equation:

• C = πd

Find the diameter:

• d = C/π
• d = 11.52 / 3
• d = 3.84 in