SOLUTION: How do I find the radius of a circle if only the area is known. Example: A circle has area 84 sq. in. Find the radius.
Thanks!
Barb Atwood
Algebra.Com
Question 821236: How do I find the radius of a circle if only the area is known. Example: A circle has area 84 sq. in. Find the radius.
Thanks!
Barb Atwood
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
A circle has area 84 sq. in. Find the radius.
:
You still use the same formula
= 84
Divide both sides by pi
=
= 26.738
Find the square root of both sides
r =
r = 5.17
:
:
Check on your calc: enter 83.97 ~ 84
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