Firstly you need to work out the length of a side. Using Pythagorian Theorum for a right angled triangle a2+b2=c2 where a = the length, b = height & c = diagonal since c = 8 and a = b are the...
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...