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Mathematics 9 Online
OpenStudy (anonymous):

Which three lengths could be the lengths of the sides of a triangle? A.12 cm, 5 cm, 17 cm B.9 cm, 22 cm, 11 cm C.21 cm, 7 cm, 6 cm D.10 cm, 15 cm, 24 cm

OpenStudy (anonymous):

the rule is sum of any two sides is always greater than the third side. So you add 2 shortest sides up to see if it is greater than the longest side. D is the answer.

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