Which are the possible side lengths of a triangle?

If you know you have a triangle, then the sum of the shortest 2 sides must be greater than the length of the longest side.  Graph this for a better understanding.

This stems from the Pythagorean Theorem, which applies only to right triangles:  x^2 + y^2 = h^2, where x and y are the shortest two sides and h is the hypotenuse.

Don't know whether or not you have studied the Law of Sines and/or the Law of Cosines, but both are relevant here.

I'll do the first one for you. it isn't very hard at all.on number one, you have (50 × 3), which equals 150, and (3 × 3), which equals 9. after you establish that, you add 150 and 9 together. so, (150 + 9) equals 159.this means that 53 × 3 = 159.