Remember that a^2 +b^2 = c^2. That should read ( a squared) plus (b squared) equals (c squared)the hypotenuse is c.So to answer your question, a right traingle could have many different length sides as long as it satifies this equation. However, in order to get the exact length for a particular triangle, you need more information. For example if you knew the length of one of the sides that would help. Or even if you did not know the length of one of the sides, but you knew that they were the same length, that would help. So to find the sides of this right triangle, you really need more information either the length of one of the sides or what is the measure of another inside angle beside the already mentioned right-angle.