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The area of a circle is 43.25cm2.
Find the length of the radius rounded to 2 DP.

User KRazzy R
by
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1 Answer

2 votes

Answer:

3.71 cm

Explanation:

Hi there!

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

Plug in the area 43.25 cm²


43.25=\pi r^2

Divide both sides by π to isolate r²


(43.25)/(\pi) =(\pi r^2)/(\pi) \\(43.25)/(\pi)=r^2

Take the square root of both sides to isolate r


\sqrt{(43.25)/(\pi)} =r\\3.71=r

Therefore, the length of the radius rounded to 2 decimal points is 3.71 cm.

I hope this helps!

User Mhogerheijde
by
6.7k points