Math-Classify and measure angles-unit 6

straight angle

an angle that measures exactly 180

right angle

an angle that measures exactly 90

acute angle

an angle that measures more than 0 but less than 90

obtuse angles

an angle that measures more than 90 but less than 180

vertical angles

angles that are opposite from one another at the intersection of two line; vertical angles are congruent

vertex

the point where two lines segments, lines, or rays meet to form an angle

adjacent angles

two angles that have a common vertex and side but are not overlapping

supplementary angles

two angles whose sum is 180

complementary angles

two angles whose sum is 90