Basic Terms in Geometry

A set of points that all lie on the same line are 

• collinear

• coplanar

• ray

• segment

An example of 2 non-collinear points.

• D, E

• C, B

• M, E

• F, B

Give another name for line k.

• Line BC

• Line BCE

• Line ED

• Line k is the only name, there isn't another name.

How would you describe points I, L, C?

• collinear

• non-coplanar

• symmetric

• coplanar points

Parallel

• lines that intersect

• lines that never cross or touch.

• lines that form a 90 degree angle

• angles that add to 180 degrees

A line that is parallel to line BD?

• BM

• MA

• DY

• AH

This is an infinite number of connected points.

• endpoint

• line

• ray

These are contained in the same line-

• ray

• segment

• collinear

Colinear points are located in the _____________-line.

• parallel

• same

• different 

An exact location in space with no length or width.

• Ray

• Point

• Line

• Line segment