Question

A lamp shade has a radius of 9 inches. What is the circumference of the top of the shade? Use 3.14 to approximate pi. Round your answer to the nearest whole number. Just say answer if you want.

Answer 1

2 x π x r
2 x 3.14 x 9 = 56.52

Hope this helps!

Answer 2

To find the circumference (c) of a circle we use this expression

c = 2 • r • pi
c = 2 • 9 • pi
c = 18 • pi
c = 56.52

Hope this helps! :)