Question

what kind of triangle is shown below? ( ) acute ( ) obtuse ( ) right

Explanation:

Step1: Recall angle - type definitions

An acute angle is less than 90°, an obtuse angle is greater than 90° but less than 180°, and a right - angle is exactly 90°.

Step2: Analyze the angles in the triangle

The angles of the triangle are 40°, 40°, and 100°. Since one of the angles (100°) is greater than 90° and less than 180°.

Answer:

Obtuse