Question

Which Scentence is true about an obtuse triangle?

A. All angles measure more than 90°.
B. All angles measure 90°.
C. One angle measures more than 90°.
D. One angle measures 90°.
E. All angles measure less than 90°.

Answer 1

C, one angle measures more than 90 degrees.

Explanation:

All triangles have two acute angles (less than 90 degrees)

so that eliminates A and B.

A right triangle has one 90 degree angle, so it's not D.

Obtuse is more than 90 degrees so there goes E.

Hope this helps! :)