Question #8f1bf

1 Answer
Feb 9, 2018

See below

Explanation:

The formula for circumference of a circle = 2pir2πr

Whre rr= radius of the circle

Therefore, the explanation would be to find the length of the diameter and multiply by piπ

or,

Multiply twice the radius to piπ

2pir2πr = 2pid/22πd2
(where r = d/2r=d2, where d = diameter of circle)

or 2pir2πr = cancel2^1pid/cancel2^1 =pid

Therefore, 2pir = pid and both explanations are stated above for circumference