In an eqilateral triangle of side a then lenght of altitude wiil be

Answers (1)

Tthe side of the equilateral triangle of side is the hypotenuse of the 30-60-90 triangle. Because the 30-60-90 triange is a special triangle, we know that the sides are x, x√3, and 2x, respectively.

Thus, a = 2x and x = a/2.

altitude of the equilateral triangle = 

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