Question

which angles are adjacent to each other? ∠5 and ∠2 ∠1 and ∠4 ∠8 and ∠1 ∠2 and ∠4

Explanation:

Step1: Recall adjacent - angle definition

Adjacent angles share a common vertex and a common side, and have no interior points in common.

Step2: Analyze each option

• For $\angle5$ and $\angle2$: They do not share a common vertex or a common - side.
• For $\angle1$ and $\angle4$: They share a common vertex and a common side, and have no interior points in common.
• For $\angle8$ and $\angle1$: They do not share a common vertex or a common - side.
• For $\angle2$ and $\angle4$: They do not share a common side.

Answer:

$\angle1$ and $\angle4$