In pythagoras's theorem, generally a is the shortest side, b is the second shortest and c is the hypotenuse: [tex] a^{2} + b^{2} = c^{2}[/tex]. However, there is a problem. The questions aren't actually possible without using sine, cosine, and tangent (which are mathematical ratios if you didn't know). I can help you with this but it will take time explaining.