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Geometry
Geometry Vocabulary
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Terms in this set (17)
right angle
an angle that measures exactly 90 degrees
straight angle
an angle that measures exactly 180 degrees
adjacent angles
angles that are next to each other and have a common vertex and side
complementary angles
two or more angles whose sum equals 90 degrees
supplementary angles
two or more angles whose sum equals 180 degrees
vertical angles
two angles formed from intersecting lines that are equal in measure and share a vertex
congruent angles
angles that are equal in measure
vertex
at point in an angle at which two rays meet
parallel lines
two lines that remain equal distance from each other- they go on and one forever and never intersect
perpendicular lines
two lines that intersect and when they do, they form right angles
ray
a line with one endpoint and extends forever in one direction
acute angle
an angle that measures LESS than 90 degrees
obtuse angle
an angle that measures MORE than 90 degrees and LESS than 180 degrees
alternate exterior angles of parallel lines
angles formed OUTSIDE of parallel lines that are on the opposite sides of the transversal
alternate interior angles of parallel lines
angles formed INSIDE the parallel lines that are on opposite sides of the transversal
transversal
a line that intersects two or more parallel lines
corresponding angles
angles formed by parallel lines and a transversal that are at matching corners and have equal measurement
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