G Basic Geometry Vocabulary

Front

A location in space that is represented by a dot and has no dimensions.

Back

Point

Front

A line has one dimension. It is represented by a line with two arrowheads, but it extends without end.

Back

Line

Front

An angle having a measure less than 90°.

Back

Acute Angle

Front

Divide into congruent segments or angles.

Back

Bisector

Front

Two lines that intersect to form a right angle.

Back

Perpendicular Lines

Front

A flat surface that extends infinitely in all directions.

Back

Plane

Front

A part of a line that has a fixed starting point and extends infinitely in one direction.

Back

Ray

Front

Two lines that never intersect and are always the same distance apart.

Back

Parallel Lines

Front

An angle that measures exactly 90°.

Back

Right Angle

Front

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

Back

Obtuse Angle