Which of these four sets of side lengths will form a right triangle?

Set 1

6 cm, 7 cm 12 cm

Set 2

8 in., 29 in., 35 in.

Set 3

3 mm 4 mm, 5 mm

Set 4

9 ft. 26 ft 6 ft

Set 1

Set 2

Set 3

Set 4

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