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The side lengths of a 45-45-90 triangle follow a consistent ratio where the legs are equal and the hypotenuse is the leg length times the square root of 2.

Diagram of a 45-45-90 right triangle showing legs of length n and hypotenuse n√2 with side ratio.

Diagram of a 45-45-90 right triangle showing legs of length n and hypotenuse n√2 with side ratio.

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