Reverse Pythagorean theorem

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

Δ ABC: 66 dm, 60 dm, 23 dm
Δ DEF: 20 mm, 15 mm, 25 mm
Δ GHI: 16 cm, 20 cm, 12 cm
Δ JKL: 58 cm, 63 cm, 23 cm
Δ MNO: 115 mm, 92 mm, 69 mm




Your answer:



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