Relations and sizes - Right triangle facts

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Determine whether each is a right triangle. Type "Y" for "Yes" or "N" for "No."
6, 8, 10 inches
6, 15, 18 meters
7, 9, 12 ft
8, 15, 17 cm
5, 8, 9 km
40, 50, 80 ft
30, 40, 50 inches
2.2, 3.4, 3.8

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Pythagorean theorem and right triangle facts