Geometry Vocabulary

A 3 sided shape with one 90 degree angle.

• left angle

• triangle

• right triangle

• rectangle

When a shape can be halved or turned to fit exactly onto itself.  A shape can be cut on a line to create 2 matching pieces.

• symmetry

• equal sides

• numerals

• perpendicular

A point where 2 lines, line segments, or rays come together.

• doorway

• vertex

• angle

• parallel

A quadrilateral that has 1 pair of parallel sides.

• triangle 

• rectangle

• square

• trapezoid

A _____________ is a part of a line. It has points on each end because it does not continue forever.

What is the correct definition of an angle? 

• one single ray

• two rays that meet at a single endpoint

• two lines that meet at a single endpoint

• two line segments that meet at a single endpoint 

• Parallelogram

• Triangle

• Octagon

An exact location in space.

• Line

• Point

• Vertex

• Ray

A ___________ is part of a line that begins with a point, then extends forever in one direction.

• Congruent Sides

• Parallel Sides

• Right Angle