### Home > CC2MN > Chapter cc29 > Lesson cc29.1.1 > Problem 9-16

9-16.

Find the circumference of each of the circles described below. Homework Help ✎

Radius of 3 inches

Diameter of 27 cm

Recall that the circumference of a circle = 2π(radius).

2π(3 inches) = 6π ≈ 18.84 inches

Refer to the diagram from part (a) and recall that the circumference = π(diameter).

27π

To get an appropriate decimal answer, round π so that it equals 3.14