How do we name angles?

Answer 1

Any way you like. Some angles are uniquely identified by their vertex. These can be numbered or allocated letters of the alphabet. Both Greek and Roman alphabets are used although with the Roman alphabet, upper case letters are more common.

Where the vertex does not identify the angle uniquely, it may be necessary to use the names of three vertices. For example, the angle XYZ is the angle formed by the rays XY and YZ when they meet at Y.