how do i do Special Right Triangles?

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They are usually either a 30-60-90 (those are the degrees of each angle) or a 45-45-90.Depending on which one it determines the equations for each length, but both have a base of x. The 30-60-90 has a hypotenuse of 2x and a leg of xroot3. The 45-45-90 has a hypotenuse of xroot2 and a leg of x.