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23 April, 15:41

A triangle has side lengths 10, 15, and 7. Is the triangle acute, obtuse, or right? Explain

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Answers (2)
  1. 23 April, 17:56
    0
    Hello,

    In a triangle, to the taller side is opposed the taller angle.

    Let's use tht Al'Kashi theorem (generalized pythaogorean's theorem)

    15²=10²+7²-2*10*7*cos (C)

    ==>cos (C) = - 76/140==>C=-122.8783 ... °

    The triangle is obtuse.
  2. 23 April, 19:34
    0
    What unit is it measured in
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