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The area of a circle is 161 in. What is the radius?​

1 Answer

4 votes

Answer:

Approximately 7.16 in

Explanation:

Hi there!

Area of a circle equation:
A=\pi r^2 where r is the radius

Plug in the given area 161 in.²


161=\pi r^2

Divide both sides by π to isolate r²


(161)/(\pi) =(\pi r^2)/(\pi) \\(161)/(\pi) =r^2

Take the square root of both sides to isolate r


=r^2\\\sqrt{(161)/(\pi)} =r\\7.16=r

Therefore, the radius of the circle is approximately 7.16 in.

I hope this helps!

User Michael Hedgpeth
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