CAB
Dihedral angle
That is called an angle.
The name of an angle that measures exactly 90 degrees is called a right angle. In geometry, a right angle is formed when two lines or line segments meet at a 90-degree angle, creating a perfect L-shape. Right angles are commonly seen in shapes such as squares, rectangles, and other geometric figures. The symbol for a right angle is a small square placed in the corner where the angle is formed.
a point
Intersection. Another name for it is the vertex.
An angle is formed where two lines meet. Parallel lines do not meet. Therefore they do not form an angle. So there is no angle to have a name. So no name.
intersection
There is no specific name in general. If the line segments are straight, then it is a triangle.
Dihedral angle
DBV
5B
The pubic arch.
Such is called an exterior angle. A useful theorem is that an exterior angle is equal to the sum of its non adjacent interior angles.
That is called an angle.
Right angles aren't formed by other angles - it is already an angle itself. However, if you bisect a right angle, it becomes two acute angles.
It is not an intersection, but the Greenwich observatory in London England.
the name of an f angle is a corresponding angle