You can put this solution on YOUR website! If it's a right triangle and two sides are equal then the two sides must be the legs and the triangle must be a 45-45-90 triangle.
With a 45-45-90 triangle we do not really need Trig. If we remember the pattern for 45-45-90 triangles, we know that the hypotenuse is always times the leg. So for this triangle the hypotenuse is .