is formed by two rays with the same end point
Angle
an angle whose measure is between 0 to 90
Acute Angle
an angle whose measure is 90
Right Angle
an angle whose measure is between 90 and 180
Obtuse Angle
angle whose measure is 180
Straight Angle
Angles with the same measurment
Congruent Angles
two angles whose side are opposite rays
Vertical Angles
two co-planar angles with a common side, a common vertex, and no common interior points
Adjacent Angles
two angles that have the sum of 90
Complementary Angles
two angles whose measures have sum 180
Supplementary Angles