32.4k views
8 votes
True or False: An equation to find Circumference is C = πr2

2 Answers

10 votes

Answer:

False

Explanation:

It's actually C=πd d is diameter or C=πr^2

User Xtina
by
4.1k points
10 votes

Answer:

True

Step-by-step explanation: Calculate circumference from area

We are given the area, and by substitution we know that 13π = πr2. We divide out the π and are left with 13 = r2. We take the square root of r to find that r = √13. We find the circumference of the circle with the formula C = 2πr.

User Jcfaracco
by
3.8k points