SOLUTION: I have an equilateral triangle, with a known length of hypotenusa (25 cms). How do I calculate the length of a side of the triangle? I don't get any further than 625 = c^2-(c/2)^2

Algebra ->  Trigonometry-basics -> SOLUTION: I have an equilateral triangle, with a known length of hypotenusa (25 cms). How do I calculate the length of a side of the triangle? I don't get any further than 625 = c^2-(c/2)^2       Log On


   



Question 460824: I have an equilateral triangle, with a known length of hypotenusa (25 cms). How do I calculate the length of a side of the triangle? I don't get any further than 625 = c^2-(c/2)^2
I need this to design a quilt - this is an equation I need quite often and I'd rather make my quilt pieces the size I want them rather than buy a pattern and live with whatever the designer wanted.

Answer by rwm(914) About Me  (Show Source):
You can put this solution on YOUR website!

It is a 30 60 90 triangle.
hypotenuse is twice the shorter side
12.5=s
The longer side is sqrt(3) * 12.5=21.65