Parallel, Perpendicular, and Intersecting Lines

Front

What are parallel lines?

Back

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

Front

What are perpendicular lines?

Back

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

Front

What does the symbol \( \parallel \) mean?

Back

It indicates that two lines are parallel.

Front

What does the symbol \( \perp \) mean?

Back

It indicates that two lines are perpendicular.

Front

If two lines intersect, what type of lines are they?

Back

They are called intersecting lines.

Front

How can you identify parallel lines visually?

Back

They will never cross each other, no matter how far they are extended.

Front

How can you identify perpendicular lines visually?

Back

They form a right angle (90 degrees) where they intersect.

Front

What is an example of parallel lines in real life?

Back

Railroad tracks are an example of parallel lines.

Front

What is an example of perpendicular lines in real life?

Back

The corner of a square or rectangle forms perpendicular lines.

Front

If line AB is parallel to line CD, what can we say about their slopes?

Back

Their slopes are equal.