Basic Terms in Geometry

An exact location in space. A point has no dimension.

• Line

• Point

• Plane

• Angles

These are two lines which never meet in space or on a plane no matter how long we extend them,

• Skew lines

• Lines

• Intersecting lines

• Parallel lines

It is a collection of points that extend forever.

• Line

• Point

• Plane

• Ray

Has no dimension and is represented by a dot 

• Point

• Plane

• Line

• Line segment

What is it called when points lie on the same line.

• Midpoint

• Coplanear

• Segment Bisector

• Collinear

Part of a line that consists of two points, called endpoints.

• Line

• Ray

• Angle

• Line segment

A point that divides, or bisects, a segment into two congruent segments

• Midpont

• Vertex

• Bisector

• Intersection

An angle with measure between 90° and 180

• Acute angle

• Obtuse angle

• Right angle

• Straight angle

Two dimensional and extends without end, even though the drawing appears to have edges

• Line

• Line segment

• Plane

• Ray

Part of a line that consists of a point called an endpoint and all points on the line that extend in one direction

• Plane

• Line segment

• Ray

• Angle