Geometry Foundation (Unit 1) Vocabulary

An exact location in space. It is represented by a dot.

• Point

• Point of Intersections

• Right Angle

• Plane

The point where two lines intersect each other.

• Point

• Plane

• Point of Intersection

• Perpendicular Lines

A set of collinear points that are connected in a one-dimensional plane. A straight one-dimensional figure that extends infinitely in both directions. It has no endpoints.

• Line Segmet

• Line

• Ray

• Parallel Lines

A pair of Two Lines that will never intersect.

• Line

• Perpendicular Lines

• Parallel Lines

• Plane

Two Lines that intersect each other and form a 90 degree angle.

• Point of Intersection

• Perpendicular Lines

• Parallel Lines

• Angle

A part of a line and has two endpoints.

• Line

• Ray

• Line Segment

• Parallel Lines

A part of a line that has a fixed starting point and extends infinitely in one direction.

• ray

• Line

• Line Segment

• Perpendicular Lines

A flat two-dimensional surface. It extends infinitely

• Line

• Plane

• Parallel Lines

• Perpendicular Lines

Formed when two straight lines or rays meet at a common endpoint (the vertex)

• Point of Intersection

• Perpendicular Lines

• Right Angle

• Angle

An angle that measures 90 degrees at the vertex

• Line

• Point of Interection

• Right Angle

• Perpendicular Lines