the orogin
There is no special angle and so it does not have a specific name.
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.
A vertex is the name of a corner on a solid where three or more faces meet (plural = vertices).
That would be a Complementary Angle.
A right angle.
There is no special angle and so it does not have a specific name.
The edges of facets -- where facets meet would be called by a geometric name: angle. You can read more about the names of cuts and their component faces/ facets, below.
Right angle.
Acute angle
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.
A vertex is the name of a corner on a solid where three or more faces meet (plural = vertices).
The corner on a shape where edges meet is called a vertex.
That would be a Complementary Angle.
A right angle.
a vortex
Vertex.
a right angle or a 90 degree angle, the sides are perpendicular to each other