SOLUTION: an equilateral triangle has an altitude of 21 inches.what is the side length of the triangle to the nearest foot?

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Question 572214: an equilateral triangle has an altitude of 21 inches.what is the side length of the triangle to the nearest foot?
Answer by nyc_function(2741) About Me  (Show Source):
You can put this solution on YOUR website!
Here is the needed equation:
(x/2)^2 + (21)^2 = x^2
After solving for x, I got x is approximately the square root of 588 as the value of one side of your equilateral triangle.

Of course, sqrt{588} can be reduced to 14(sqrt{3}).

So, the length of the side of your triangle is 14(sqrt{3}).