What is the radius of a circle with circumference of 22m?

1 Answer
Nov 16, 2015

Approximately 3.53.5 m

Explanation:

The circumference of a circle C is equal to:
C=2*pi*rC=2πr
That's because the diameter of a circle fits piπ times in the circumference. So if you solve rr
r=C/(2*pi)=22/(2*pi)~~3.5r=C2π=222π3.5

(using the approximation pi ~~ 22/7π227)