# Reverse Pythagorean theorem

Given are lengths of the sides of the triangles. Decide which one is rectangular:

Δ ABC: 77 dm, 85 dm, 36 dm Δ DEF: 55 dm, 82 dm, 61 dm Δ GHI: 24 mm, 25 mm, 7 mm Δ JKL: 32 dm, 51 dm, 82 dm Δ MNO: 51 dm, 45 dm, 24 dm Leave us a comment of example and its solution (i.e. if it is still somewhat unclear...): Be the first to comment! #### To solve this example are needed these knowledge from mathematics:

Pythagorean theorem is the base for the right triangle calculator. See also our trigonometric triangle calculator.

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