Perpendicular, Parallel, 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

How can you identify parallel lines in a figure?

Back

Parallel lines can be identified by looking for lines that are equidistant from each other and do not intersect.

Front

What is the symbol used to denote parallel lines?

Back

The symbol '||' is used to denote parallel lines.

Front

What is the symbol used to denote perpendicular lines?

Back

The symbol '⊥' is used to denote perpendicular lines.

Front

Can two lines be both parallel and perpendicular?

Back

No, two lines cannot be both parallel and perpendicular; they are mutually exclusive.

Front

What is the relationship between the slopes of parallel lines?

Back

The slopes of parallel lines are equal.

Front

What is the relationship between the slopes of perpendicular lines?

Back

The slopes of perpendicular lines are negative reciprocals of each other.

Front

How do you determine if two lines are perpendicular using their slopes?

Back

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