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

Question

Adan Patrick

Mathematics

29 May, 09:44

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

+1

Answers (2)

Know the Answer?

Grant Gill · Answer 1

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.

Lyric Hamilton · Answer 2

Lyric Hamilton 29 May, 10:06

0

What unit is it measured in