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Lines and Angles

TermDefinition
Line Connected points that go forever in 2 directions
Angle 2 rays or 2 line segments with a shared vertex
Parallel 2 lines that are in the same plane that never intersect.
Vertical The angles opposite of each other when 2 lines intersect. They share a vertex and are congruent.
Line Segment Connected points that have a distinct beginning and ending point
Acute An angle that is between 0 and 90 degrees; not including 90 degrees
Intersecting 2 lines that cross at single point
Complementary 2 angles whose sum of measure equals 90 degrees
Ray Connected points that have a distinct beginning point and continue forever in one direction
Obtuse An angle that measures between but does not include 90 and 180 degrees
Perpendicular 2 lines that cross at a single point forming 90 degree angles
Transversal The line that crosses parallel lines forming 8 angles
Right An angle that measures exactly 90 degrees
Corresponding Angles that are on the same side of a transversal and in the same location on different parallel lines; they are congruent
Alternate Interior Angles that are on opposite sides of the transversal but inside the parallel lines; they are congruent
Straight An angle that measures exactly 180 degrees
Vertex A distinct point where lines intersect or angles originate
Supplementary 2 angles whose sum or measure equals 180 degrees
Alternate Exterior Angles that are on opposite sides of the transversal and outside of the parallel lines; they are congruent
Line Relationship The way 2 lines perform together, such as parallel, perpendicular, or intersecting
Angle Relationship The way 2 angles perform together, such as vertical, adjacent, supplementary, etc.
Adjacent 2 angles that are side by side, share a vertex, and share one side
Created by: WGMS107
 

 



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