Geometry Terms

Do not intersect, and yet they are also not parallel. They lie in different planes.

• Skew lines

• Parallel lines

• Perpendicular lines

• Straight lines

An exact location in space. It is usually represented as a dot, but it has no size at all.

• Point

• Plane

• Line

• Angle

An angle that measures less than 90°.

• Acute

• Obtuse

• Right

• Complementary

An angle that measures more than 90° but less than 180°.

• Obtuse

• Acute

• Right

• Supplementary

When angles have the same measure.

• Congruent

• Confluent

• Even

• Consignment

Part of a line or a ray that extends from one endpoint to another.

• Line segment

• Line

• Ray

• Array

A perfectly flat surface that extends infinitely in all directions.

• Plane

• Point

• Coordinate

• Number line

An angle that measures 180°.

• Straight angle

• Supplementary angle

• Right angle

• Obtuse angle

Tags

CCSS.4.G.A.1

CCSS.4.G.A.2

Side by side and have a common vertex and ray. May or may not be congruent.

• Adjacent angles

• Complacent angles

• Vertical angles

• Supplementary angles

Two angles whose measures have a sum of 90°.

• Complementary angles

• Adjacent angles

• Vertical angles

• Supplementary angles