What's the formula for these special right triangles?

What's the formula for these special right triangles?
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answer:In a 45–45-90 triangle, the measure of the hypotenuse is equal to the measure of a leg multiplied by SQRT(2). In a 30–60-90 triangle, the measure of the hypotenuse is two times that of the leg opposite the 30o angle. The measure of the other leg is SQRT(3) times that of the leg opposite the 30o angle.
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