Question

how many obtuse angles are in an obtuse triangle?
0
2
1
3

Explanation:

Step1: Recall triangle angle sum

The sum of angles in a triangle is $180^\circ$.

Step2: Define obtuse angle

An obtuse angle is $>90^\circ$ and $<180^\circ$.

Step3: Test multiple obtuse angles

If there were 2 obtuse angles, their sum would exceed $180^\circ$, violating the angle sum rule.

Answer:

1