This is probably a very basic question for this site, but it got me stumped.
For a right triangle with one leg (A) and perimeter (L) given, how do I calculate the hypotenuse (C) and second leg (B)? I know that $A^2+B^2=C^2$ and that $A+B+C=L$, but I couldn't find a way to find B and C given A and L.