Equilateral triangle with perpendicular height h
I don't know how to go about this question :
An Equilateral triangle has perpendicular height h. A) find the length of each side, in terms of h B) without using your calculator, show that the area of the triangle is h^2/√3
Do I use Pythagoras? But that would be if the sides are length l : l2=(1/2l)2+h2. I don't see a way to do that in terms of h...