Parallel, Perpendicular, and Intersecting Lines

Front

What are parallel lines?

Back

Parallel lines are lines in a plane that never meet. They are always the same distance apart.

Front

What are perpendicular lines?

Back

Perpendicular lines are lines that intersect at a right angle (90 degrees).

Front

What are intersecting lines?

Back

Intersecting lines are lines that cross each other at any angle.

Front

If two lines are parallel, what can be said about their slopes?

Back

If two lines are parallel, their slopes are equal.

Front

If two lines are perpendicular, what is the relationship between their slopes?

Back

If two lines are perpendicular, the product of their slopes is -1.

Front

Give an example of parallel lines in real life.

Back

Railroad tracks are an example of parallel lines.

Front

Give an example of perpendicular lines in real life.

Back

The edges of a book are an example of perpendicular lines.

Front

Give an example of intersecting lines in real life.

Back

The intersection of two roads is an example of intersecting lines.

Front

What symbol is used to denote parallel lines?

Back

Front

What symbol is used to denote perpendicular lines?

Back