Which of these four sets of side lengths will form a right triangle? Set 1 10 cm, 26 cm, 24 cm Set 2 4 in., 2 in., 6 in. Set 3 14 mm, 13 mm, 15 mm Set 4 10 ft, 30 ft, 20 ft

For a right triangle, the squares of the two shorter sides must add to the square of the longest side. In Set 1, 10² + 24² = 100 + 576 = 676, and 26² = 676, so these lengths form a right triangle. Set 2 and Set 4 cannot form triangles because their two shorter sides add up to the longest side.

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