120 degrees and 240 degrees.
get yourself a cartesian circle, or just look at one online and translate it from there 3,6,9, and 12 would all be 90 deg increments.
An angle cannot be formed by only one ray. However, an angle formed by two opposite rays is called a straight angle.
straight angle
is called a straight angle
central angle central angle
straight angle
thrust angle
30 degrees
An angle is the shape formed by two rays, called the arms of the angle, meeting at a common endpoint, called its vertex.
It is called vertical.
It is called the central angle. Hope that helped!