3rd Grade: Geometry Vocabulary Week 1

Front

What is part of a line that has one endpoint and continues forever in one direction?

Back

ray

Front

Two line segments or rays that meet an endpoint form an _______

Back

angle

Front

An angle that forms a square corner.

Back

Right angle.

Front

An angle smaller than a right angle.

Back

acute angle

Front

An angle larger than a right angle

Back

obtuse angle

Front

Two lines that will never intersect/ meet

Back

parallel lines

Front

A closed figure with 4 sides

Back

quadrilateral

Front

A quadrilateral with opposite sides that are parallel and the opposite sides also have the same length. This can also be a square and a rectangle.

Back

parallelogram

Front

A quadrilateral with opposite sides that are parallel and the opposite sides are the same length. All four sides are not necessarily the same length.

Back

rectangle

Front

A quadrilateral with exactly one pair of opposite sides that are parallel

Back

trapezoid