SOLUTION: What is the area of an equilateral triangle whose sides are 10?

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Question 759066: What is the area of an equilateral triangle whose sides are 10?
Answer by jim_thompson5910(35256) About Me  (Show Source):
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A = (s^2)*sqrt(3)/4

A = (10^2)*sqrt(3)/4

A = 100*sqrt(3)/4

A = 25*sqrt(3) <--- Exact Area

A = 43.30127 <--- Approximate Area