Geometry:Angles-classify and relationship

linear pair

Two adjacent angles that form a straight line and are supplementary

straight angle

angle that measures exactly 180 degrees

right angle

angle that measures exactly 90 degrees

acute angle

angle that measures less than 90 degrees

obtuse angle

angle that measures more than 90 degrees but less than 180 degrees

supplementary angles

two angles whose measures have sum 180

complementary angles

two angles whose measures have sum 90

vertical angles

two angles whose sides form two pairs of opposite rays

adjacent angles

two coplanar angles with a common side , a common vertex, and no common interior points