How many triangles can I make with side lengths of 15 in, 7 in, and 4 in?

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asked Mar 17, 2019 21.0k views

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How many triangles can I make with side lengths of 15 in, 7 in, and 4 in?

Mathematics
college

Michael Chao asked

by Michael Chao

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If those sides can form a triangle, the longest side must be less than the sum of the other 2 sides.

15 is NOT less than (7 + 4) and therefore no triangle can be formed.

Sondre answered Mar 22, 2019

by Sondre

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