Lines, Line segments, Rays & Angles Flashcard

Front

What is a line?

Back

A straight path that extends infinitely in both directions.

Front

What is a line segment?

Back

A part of a line that has two endpoints.

Front

What is a ray?

Back

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

Front

What are parallel lines?

Back

Lines that never intersect and are always the same distance apart.

Front

What are intersecting lines?

Back

Lines that cross each other at one point.

Front

What are perpendicular lines?

Back

Lines that intersect to form right angles (90 degrees).

Front

What is an angle?

Back

A figure formed by two rays with a common endpoint called the vertex.

Front

What is a vertex?

Back

The point where two rays meet to form an angle.

Front

What is an acute angle?

Back

An angle that measures less than 90 degrees.

Front

What is a right angle?

Back

An angle that measures exactly 90 degrees.