Question

classify this triangle by its angle measures: 31° 97° 52° acute obtuse right

Explanation:

Step1: Recall angle - type definitions

An acute - angled triangle has all angles less than 90°. A right - angled triangle has one angle equal to 90°. An obtuse - angled triangle has one angle greater than 90°.

Step2: Analyze given angles

The angles of the triangle are 31°, 52°, and 97°. Since 97°>90°, the triangle has an obtuse angle.

Answer:

obtuse