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.
0 degrees
A central angle is an angle whose vertex is at the center of a circle and whose sides (or rays) extend to the circumference, effectively subtending an arc on the circle. The measure of a central angle is equal to the measure of the arc it subtends. For example, if the central angle measures 60 degrees, the arc it subtends will also measure 60 degrees.
An inscribed angle is an angle whose vertex is on the circle and whose sides are chords.
central angle
an acute angle
The measure of an angle whose sides overlap is 0 degrees. It is than not an angle, but rather a line.
0 APEX!!
zero
0 degrees
A central angle is an angle whose vertex is at the center of a circle and whose sides (or rays) extend to the circumference, effectively subtending an arc on the circle. The measure of a central angle is equal to the measure of the arc it subtends. For example, if the central angle measures 60 degrees, the arc it subtends will also measure 60 degrees.
An angle whose measure is exactly 180 degrees is a straight angle.
hextogonImproved Answer:-A regular 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
Right Angle
An angle whose measure is two times 90 degrees is a 180 degree angle, which is also a straight angle.