Identifying parallel and perpendicular 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 it mean for lines to intersect?

Back

Lines that cross each other at any angle.

Front

What angle do perpendicular lines form?

Back

A right angle.

Front

How many sets of parallel sides does a rectangle have?

Back

2 sets of parallel sides.

Front

How many sets of parallel sides does a square have?

Back

2 sets of parallel sides.

Front

Can two lines be both parallel and intersecting?

Back

No, parallel lines never intersect.

Front

What is an example of parallel lines in real life?

Back

Railroad tracks.

Front

What is an example of perpendicular lines in real life?

Back

The corners of a square or rectangle.

Front

If two lines are perpendicular, what can we say about their slopes?

Back

The product of their slopes is -1.