Question

1. fill in the blank ∠2 and ∠4 are

Explanation:

Step1: Recall angle - pair relationships

Adjacent angles share a common side and a common vertex. In the given figure, ∠2 and ∠4 share a common side and a common vertex.

Step2: Identify the angle - pair type

Since ∠2 and ∠4 are adjacent and their non - common sides form a straight line, they are a linear pair. The sum of angles in a linear pair is 180°. We say they are supplementary adjacent angles.

Answer:

supplementary adjacent angles