Question

Find the circumference of the circle. Use 3.14 for π. Round to the nearest tenth if necessary.

A.
34.8 cm

C.
32.1 cm

B.
21.7 cm

D.
28.3 cm

Answer 1

Answer: D

Explanation:

Multiply 2 times 3.14 times the radius, which is half the diameter. So divide 9 in half to get 4.5 as the radius. 2 times 3.14 times 4.5 equals 28.29. Round up to the nearest tenth equaling 28.3.

Answer 2

The answer is D. 28.3