Parallel and Perpendicular 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

Can two lines be both parallel and perpendicular?

Back

No, two lines cannot be both parallel and perpendicular at the same time.

Front

How can you identify parallel lines in a shape?

Back

Look for lines that are equidistant from each other and never intersect.

Front

How can you identify perpendicular lines in a shape?

Back

Look for lines that meet at a right angle (90 degrees).

Front

What is an example of parallel lines in real life?

Back

The rails of a train track 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 is an example of perpendicular lines.

Front

If Line AC is parallel to Line DF, what can you say about their slopes?

Back

If Line AC is parallel to Line DF, their slopes are equal.

Front

If Line BG is perpendicular to Line AC, what can you say about their slopes?

Back

If Line BG is perpendicular to Line AC, the product of their slopes is -1.

Front

How many sets of parallel sides does a rectangle have?

Back

A rectangle has 2 sets of parallel sides.