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9.1-9.3 & 9.5

Geometry Terms

Geometry TermDefinition
Point Location in space with no size
Line Series of points that extends in two directions without end.
Intersecting lines Two lines that have exactly one point in common.
Skew lines Lines that do not intersect, are not parallel and do not lie in the same plane.
Adjacent Angles Angles that share a vertex and have a common side.
Vertical Angles Angles formed by two intersecting lines, are opposite each other and are congruent.
Congruent Angles Angles that have the same measure.
Supplementary Angles Two angles that sum to 180 degrees.
Complementary Angles Two angles that sum to 90 degrees.
Transversal A line that intersects two other lines.
Corresponding Angles Angles that lie on the the same side of the transversal and in corresponding positions.
Alternate Interior Angles Angles in the interior of a pair of lines and on opposite sides of the transversal.
Plane A flat surface with no thickness that extends in all directions.
Segment A part of a line that has 2 endpoints.
Ray A part of a line that has exactly one endpoint.
Parallel Two lines that lie in the same plane and do not intersect.
Created by: mclauchlinb