Question

1. classify the following angle. straight acute right obtuse

Explanation:

Step1: Recall angle - type definitions

An acute angle is less than 90 degrees, a right - angle is exactly 90 degrees (marked by a small square), an obtuse angle is greater than 90 degrees but less than 180 degrees, and a straight angle is 180 degrees.

Step2: Observe the given angle

The given angle has a small square at its vertex, which indicates it is a 90 - degree angle.

Answer:

C. right