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Reverse Pythagorean theorem
Given are lengths of the sides of the triangles. Decide which one is rectangular:
Δ ABC: 73 m, 66 m, 51 m
is
isn't
Δ DEF: 63 cm, 105 cm, 84 cm
is
isn't
Δ GHI: 50 dm, 48 dm, 14 dm
is
isn't
Δ JKL: 31 m, 45 m, 40 m
is
isn't
Δ MNO: 28 m, 53 m, 45 m
is
isn't
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