Question

Lena's engagement ring has a radius of 9 millimeters. What is the ring's circumference? Use 3.14 for ​

Answer 1

Given - Radius of ring is 9 millimeters

To find - Circumference

Solution -

9 millimeters = 0.9 centimeters

Circumference of circle = 2 × pie × r

= 2 × 3.14 × 0.9

= 6.28 × 0.9

= 5.652