Question

The lengths of the sides of a triangle are 7​, 8, and 11. Classify the triangle as​ acute, right, or obtuse.

Answer 1

c^2 < a^2 + b^2 = acute

c^2 >  a^2 + b^2 = obtuse

c^2 =  a^2 + b^2 = right

so

11 ^2 ? 7^2 + 8^2

121 > 113

answer

the triangle is​ an obtuse triangle