SOLUTION: What is the exact perimeter of an equilateral triangle that has a height of 18 cm.

Question 939987: What is the exact perimeter of an equilateral triangle that has a height of 18 cm.
Answer by MathLover1(20849) (Show Source): You can put this solution on YOUR website!

An equilateral triangle has equal sides.
If each side is and a height is , we know that divides equilateral triangle into two right triangles with legs and , and hypotenuse .
use Pythagoras theorem to find when

then the exact perimeter is:

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