Question

The lens of a telescope has a radius of 1 foot. What is the lens's circumference?

Use 3.14 for ​.

Answer 1

Circumference = 2 x 3.14 x 12

C = 2pi r

1 ft = 12 inches

Explanation:

Answer 2

Circumference = 2 x 3.14 x 12
C = 2pi r
1 ft = 12 inches