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Which of these groups of numbers could NOT be the side lengths of a triangle? A. 11,13,15 B. 5,7,8 C. 2,4,4 D. 1,3,5
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Which of these groups of numbers could NOT be the side lengths of a triangle? A. 11,13,15 B. 5,7,8 C. 2,4,4 D. 1,3,5

User Nkrkv
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Triangles have to satisfy the triangle inequality, which says the sum of any two sides is strictly greater than the third.

That fails for triangle D, because 1 + 3 < 5

Answer: D


User Turtlemonvh
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