Geometry Vocabulary Flashcards

Front

Parallel Lines

Back

Lines that never meet, no matter how far they are extended.

Front

Perpendicular Lines

Back

Lines that meet at a right angle (90 degrees).

Front

Right Angle

Back

An angle that measures exactly 90 degrees.

Front

Acute Angle

Back

An angle that measures less than 90 degrees.

Front

Obtuse Angle

Back

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

Front

Protractor

Back

A tool used to measure angles in degrees.

Front

Point

Back

A location in space.

Front

Line

Back

A straight path that extends infinitely in both directions.

Front

Line Segment

Back

Part of a line with two endpoints.

Front

Ray

Back

A part of a line that starts at one point and extends infinitely in one direction.