If two sides of a triangle are 9 and 15. The possible third side is
15 - 9 = 6
15 + 9 = 24.
If degenerate triangles are allowed, then the interval is [6, 24].
If non including degenerate triangles, the interval is (6, 24).
I hope this helped. :)))
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Will the side lengths below form a triangle? 15, 12, 9
yes or no
Yes because 9 + 12 > 15.
