Im struggling with Naming angles Measuring angles Constitution of angles Construction circle Geometry of straight lines Terminology of line segments Perpendicular Classifying 2d shapes triangles

An angle is named using three capital letters. The middle letter must be the vertex (the point where the two rays meet), and the other two letters are points on each of the rays. For example, if the vertex is point B, and there are points A and C on the rays, the angle can be named $\angle ABC$ or $\angle CBA$.

If there is only one angle at a vertex, you can sometimes name the angle using just the vertex letter. For example, if point B is the vertex and there's only one angle there, you can call it $\angle B$. However, this can be ambiguous if multiple angles share the same vertex.

Consider an angle with vertex P, and points Q and R on its rays.
The angle can be named $\angle QPR$ or $\angle RPQ$.
If there is only one angle at vertex P, it can also be named $\angle P$.