SOLUTION: A piece of art is in the shape of an equilateral triangle with sides of 20 in. Find the area of the piece of art round your answer to the neatest tenth ( hint the area of a triangl

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Question 1069414: A piece of art is in the shape of an equilateral triangle with sides of 20 in. Find the area of the piece of art round your answer to the neatest tenth ( hint the area of a triangle is base time height divided by two )
Answer by josgarithmetic(39613) About Me  (Show Source):
You can put this solution on YOUR website!
Altitude cuts the triangle into two special 30-60-90 triangles.

Use Pythagorean Theorem formula to find the altitude value.

Use area formula %281%2F2%29%2Abase%2Aheight and multiply by 2.