Question

which of the following angles is a right angle?

Explanation:

Step1: Recall right - angle definition

A right - angle measures 90 degrees and is represented by a small square at the vertex.

Step2: Examine each option

The first option has a small square at the vertex, indicating it is a 90 - degree angle. The other options do not have this symbol and have different angular measures.

Answer:

The first option (the angle with the small square at the vertex)