Question

Cynthia wants to decorate a round photo frame for her brother. If the diameter is 18 cm what is the circumference of the frame?

A. 56.52 cm
B. 54 cm
C. 28.26 cm
D. 113.04 cm

Answer 1

56.52 should be the answer . A is the correct answer

Answer 2

A. 56.52

Explanation:

Circumference = 2πr

Radius is half of the diameter, but 2 times radius is also simply the diameter. Therefore, the solution of the problem would be 18 times π. In this case, we can round π to 3.14, and 18 times 3.14 is 56.52.