Question

A circle has a circumference of 150 meters. What is the measure of its radius? Round

to the nearest tenth.
circumference = 150 m
What is the measure of its radius?

Answer 1

`2\pi * \: r = 150 \\ 6.2831r = 150 \\ (6.2831r)/(6.2831) = (150)/(6.2831) \\ r = 23.87cm`

Answer 2

23.9

Explanation:

circumference = Diameter · Pie

150 = X · pie

divide both sides by pie(use the accrual symbol on a calc) and you get 47.7 as the diameter then divide 47.7 by 2 and you get 23.9 as you radius