Geometry - Chapter 3 Terms

Front

Line

Back

A straight one-dimensional figure having no thickness and extending infinitely in both directions.

Front

Angle

Back

The figure formed by two rays, called the sides of the angle, sharing a common endpoint, called the vertex of the angle.

Front

Parallel Lines

Back

Lines in a plane that do not meet; they are always the same distance apart.

Front

Skew Lines

Back

Lines that are not parallel and do not intersect, usually in three-dimensional space.

Front

Intersecting Lines

Back

Lines that meet or cross at a common point.

Front

Transversal

Back

A line that passes across two or more other lines in the same plane.

Front

Angle Pairs Formed by Transversal

Back

Pairs of angles that are formed when a transversal crosses two other lines.

Front

Alternate Interior Angles

Back

Angles that are on opposite sides of the transversal and inside the two lines.

Front

Alternate Exterior Angles

Back

Angles that are on opposite sides of the transversal and outside the two lines.

Front

Congruent Angles

Back

Angles that have the same angle measure.