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Which set of lengths CANNOT form a right triangle?

Class 10Pythagoras TheoremGeometry — Similarity

A(8, 9, 12)
B(9, 12, 15)
C(8, 15, 17)
D(20, 21, 29)

Step-by-Step Solution

Check

8^{2} + 9^{2} = 64 + 81 = 145

, but

1 2^{2} = 144

, not equal. The others satisfy

a^{2} + b^{2} = c^{2}

.

Answer: A) (8, 9, 12)

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