Geometry Vocabulary

Front

One fixed endpoint and extends infinitely along the line from the endpoint.

Back

ray

Front

Which word does the figure above model?

Back

line segment

Front

An acute angle is

Back

an angle less than 90 degrees

Front

When lines meet or cross at some point they are called

Back

intersecting

Front

Attributes are

Back

information that determines the properties of something

Front

Which word means when one shape becomes exactly like another a flip, slide, or turn?

Back

symmetry

Front

A polygon is

Back

a closed figure with 3 or more straight sides

Front

I have four sides, what am I?

Back

I am a quadrilateral.

Front

Which best describes the rectangle above?

Back

I am a quadrilateral with opposite sides equal and 4 right angles.

Front

A polygon with 3 sides is

Back

a triangle.