Key Terms Understanding Geometry

What are the coordinates of the point D?

• (4, 0)

• (0, 4)

• (5, 0)

• (0, 5)

An undefined term in Geometry. A specific location. It has no dimension and is represented by a dot.

• Line

• Midpoint

• Collinear

• Point

An undefined term in Geometry. A connected straight path. It has no thickness and it continues forever in both directions.

• Endpoints

• Midpoint

• Line

• Segment Bisector

The point that divides the segment into two segments that have the same length.

• Coplanar

• Midpoint

• Ray

• Line

An undefined term in Geometry. A flat surface. It has no thickness and it extends forever in all directions.

• Plane

• Line

• Point

• Ray

Two rays that have a common endpoint and form a line.

• Opposite Rays

• Plane

• Parallel

• Midpoint

A portion of a line that starts at a point (the endpoint) and continues forever in one direction.

• Point

• Parallel

• Ray

• Line

Points that lie on the same line

• Space

• Collinear Points

• Bisector

• Coplanar Points

Points or lines that are not in the same plane.

• Non-Coplanar

• Coplanar

• Collinear

• Parallel

Lines that are not coplanar and do not intersect.

• Collinear

• Skew Lines

• Non-Collinear

• Ray