Question

which is the correct label for the angle? ∠a ∠bca ∠b ∠cba

Explanation:

Step1: Recall angle - naming convention

An angle can be named using the vertex letter when there is only one angle at that vertex. When multiple angles share a vertex, we use three - letter naming where the vertex letter is in the middle. Here, the vertex of the angle is B and the rays are BA and BC.

Step2: Identify the correct name

Based on the above convention, the angle can be named as ∠CBA.

Answer:

∠CBA