How to use special right triangles to determine the leg of a triangle

What type of triangle is formed when there is a 90 degree angle and a 45 degree angle?

How do you find the length of the hypotenuse in a 45-45-90 triangle if you know the length of one leg?

What is the relationship between the legs and the hypotenuse in a 45-45-90 triangle?

What should you do to rationalize the denominator when you have an answer like 17/sqrt(2)?

What is the final answer for the length of the legs when the hypotenuse is given as 17?