How do you calculate a diagonal?

Answer:
The easiest way to calculate a diagnol is with the pythagorean theorem if A is the length of the hypotenuse, and B and C are the legs of a right triangle:
A = (B^2+C^2)^.5
If you are given certain angle(s) and and a side length, you can use trigonometry to find a diagnol.


Note: correct spelling is D I A G O N A L.
First answer by Schnazola. Last edit by Nikimoto. Contributor trust: 0 [recommend contributor recommended]. Question popularity: 15 [recommend question].