Geometry

The correct answer is B., .

 

1. Recall the definition of an angle in terms of rays:

An angle is formed by two rays with a common endpoint, which is the vertex of the angle. For , the vertex is point .

The rays that form the angle should start from the vertex .

One ray starts from  and passes through , denoted as . The other ray starts from  and passes through , denoted as .

 

2. Analyze each option:

A: The ray  starts from  and goes towards , so it does not start from the vertex  of . This option is incorrect.

 

B: Since the vertex of  is

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