SOLUTION: Workers plan to apply a reflective coating of paint to one surface of an equilateral triangular shaped highway sign. How many square inches of coating need to be applied to the sig
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Question 833670: Workers plan to apply a reflective coating of paint to one surface of an equilateral triangular shaped highway sign. How many square inches of coating need to be applied to the sign if one side of the triangle is 18 inches?
Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
9^2+c^2=18^2
c = 9 sqrt(3)
1/2*81*sqrt(3)
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