Question

What is the circumference of a circle with a diameter of 9 inches? (use for pi)

Answer 1

Circumference formula: 2πr

2 multiply the π by the radius which will be 4.5 because to get the radius u will have to to do 9 divide 2 which will be 4.5.

Calculate that in the calculator and you’ll get:

C=28.3 ( I rounded to the nearest tenth)