look at this angle:\nname this angle in three different ways:\n____ and ____ and ____

Brief Explanations:

1. When naming an angle with 3 letters, the vertex (the common endpoint of the two rays) is placed in the middle. Here, vertex is A, so we use the two rays' endpoints on either side.
2. When there's only one angle at a vertex, we can name it using just the vertex letter with the angle symbol.
3. We can also use a single letter for the angle if it's labeled, but since no label is given, we use the standard three-letter and vertex-only names, plus a third form using the vertex with the angle symbol in a concise way.

Answer:

$\angle BAC$ and $\angle CAB$ and $\angle A$