Two rays with the same endpoint
Angle
An angle between 0 and 89 degrees
Acute Angle
An angle of 90 degrees
Right Angle
An angle between 91 and 179 degrees
Obtuse Angle
An angle of 180 degrees
Straight Angle
Angles with the same measurement
Congruent Angle
Two angles whose sides are opposite rays.
Vertical Angle
Two coplanar angles with a common side, a common vertex, and no common interior points.
Adjacent Angles
Two angles whose measures have the sum of 90
Complementary Angles
Two angles whose measure have the sum of 180
Supplementary Angles