Geometry Basics

Front

Plane

Back

A flat surface made of points that extends indefinitely in all directions.

Front

Adjacent Angles

Back

Two angles that share a common vertex and side.

Front

Line

Back

Made up of points with thickness or width; Extends indefinitely in both directions.

Front

Linear Pair

Back

Adjacent angles that are supplementary.

Front

Point

Back

A location with no size or shape.

Front

Bisector

Back

A line, ray, or segment that divides an angle or segment into two equal parts.

Front

Supplementary

Back

Two angles with measures that have a sum of 180.

Front

Perpendicular

Back

Two lines that intersect at a 90 degree angle.

Front

Vertical Angles

Back

Congruent angles that are across from each other on intersecting lines.

Front

Ray

Back

A line that extends indefinitely in one direction.