Geometry

The correct answer is C. , .

 

1. Recall the definition of an angle formed by rays:

An angle is composed of 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 , and the other ray starts from  and passes through , denoted as .

 

2. Analyze each option:

A: Ray notation requires a starting - point and a direction.  and  are not proper ray notations for forming , so this option is incorrect.

 

B:  is not a correct ray notation, and these do not form  correctly, so this option is incorrect.

 

C: Since the vertex of

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