Question

name one angle linear to ∠3. ∠? enter the angle number.

Explanation:

Step1: Recall linear - angle definition

Two angles are linear if they are adjacent and their non - common sides form a straight line.

Step2: Identify linear angle to ∠3

∠3 and ∠4 share a common side and their non - common sides form a straight line. Also, ∠3 and ∠2 share a common side and their non - common sides form a straight line.

Answer:

4