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°.

C, one angle measures more than 90 degrees.

Step-by-step 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! :)

need more information

step-by-step explanation:

check above link.

graphically?   well, you graph them both, the solutions is where they both intersect each other, since there are two solutions, meaning they will meet twice, or namely the linear will run into the quadratic curve twice, and where they meet, those x,y coordinates are the solutions to the system.