Question

m∠abc = 135°
what type of angle is it?
obtuse
straight
right
acute

Explanation:

Step1: Recall angle - type definitions

An acute angle is less than 90°. A right - angle is exactly 90°. A straight angle is exactly 180°. An obtuse angle is greater than 90° and less than 180°.

Step2: Compare given angle to definitions

The given angle \(m\angle ABC = 135^{\circ}\). Since \(90^{\circ}<135^{\circ}<180^{\circ}\), it is an obtuse angle.

Answer:

A. obtuse