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Point

Has no dimension. Location in space.

Plane

Extends in two dimensions infinitely.

line

Extends in one dimension infinitely.

Collinear

Two or more points on the same line.

Coplanar

Tow or more objects on the same plane.

Line Segment

Part of a line that consists of 2 endpoints and all points between.

Ray

Part of a line that consists of initial starting point and all points to one side.

Opposite Ray

Two collinear rays that share the same initial point but no other points.

Intersection

When two or more objects cross or meet.

Angle

Two rays that have the same initial starting point.

Congruent

Objects having the same shape, and measurement.

Adjacent Angles

Two angles who share the same vertex and side but no common interior points.

Midpoint

A point that divides a segment into two congruent parts.

Bisect

Cuts something into two congruent parts.

Linear Pair

Adjacent angles whose non-common side is a straight angle.

Complementary Angles

Any two angles whose sum is 90.

Supplementary Angles

Any two angles whose sum is 180.