zero
The measure of an angle whose sides overlap is 0 degrees. It is than not an angle, but rather a line.
Inscribed angle
It is an inscribed angle.
An angle of 170 degrees is an obtuse angle.
an angle whose vertex is the center of the polygon and whose sides pass through adjacent vertices.
The measure of an angle whose sides overlap is 0 degrees. It is than not an angle, but rather a line.
0 degrees
0 APEX!!
For the sides to overlap, the angle must be so wide as to double back over itself. Thus, it must be 360 degrees or greater.
-- an angle that measures 90 degrees -- an angle whose sides are mutually perpendicular
If it's a regular polygon and each exterior angle measures 72 degrees then it is a pentagon which has 5 sides
An inscribed angle is an angle whose vertex is on the circle and whose sides are chords.
central angle
Inscribed angle
An inscribed angle.
an acute angle
A single ray.