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# The area of the in-circle of an equilateral triangle side 42 cm is ?

A) 472 cm^2

B) 231 cm^2

C) 22root3 cm^2

D) 924 cm^2

Update:

Can u tell me the steps...

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- Anonymous9 years agoFavorite Answer
None of these. It's 147*pi.

- jariyaLv 59 years ago
I get 462 cm^2 so the closest answer is A

well draw the picture fist Any euilateral triangle has 60 degrees to all its angles

Tan 30 = radius /(42/2)= .58 , radius= 21x.58=12.12 cm

area of circle= pir^2= 22/7x 12.12^2= 462cm^2

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