A flat surface made up of points that extends indefinitely in all directions.
Plane
A location with no size or shape.
Point
Made up of points with no thickness or width; Extends indefinitely in both directions.
Line
A line that extends indefinitely in one direction.
Ray
The intersection of two rays at a common endpoint.
Angle
Adjacent angles that are supplementary
Linear Pair
Two lines that intersect at a 90° angle.
Perpendicular
Points that lie on the same line.
Collinear
Congruent angles that are across from each other on intersecting lines.
Vertical Angles
Points that lie on the same plane.
Coplanar
Two angles with measures that have a sum of 180°.
Supplementary
Two angles that share a common vertex and side.
Adjacent Angles
Two angles with measures that have a sum of 90°.
Complementary
A line, ray, or segment that divides an angle or segment into two equal parts.
Bisector
A measurable part of a line consisting of two endpoints.
Line Segment