Parallel, Skew, and Perpendicular

Front

What are Perpendicular Lines?

Back

Lines that intersect at a 90 degree angle.

Front

What are Parallel Lines?

Back

Lines that are in the same plane and never intersect.

Front

What are Skew Lines?

Back

Lines that do not intersect and are not parallel, and are not in the same plane.

Front

How can you identify Perpendicular Lines in a diagram?

Back

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

Front

What is the relationship between Parallel Lines and Transversals?

Back

When a transversal crosses parallel lines, it creates corresponding angles that are equal.

Front

What is an example of Perpendicular Lines in real life?

Back

The edges of a square or rectangle.

Front

What is an example of Parallel Lines in real life?

Back

Railroad tracks.

Front

What is an example of Skew Lines in real life?

Back

The edges of a staircase and the floor.

Front

If line AB is parallel to line CD, what can be said about their slopes?

Back

Their slopes are equal.

Front

If two lines are perpendicular, what is the product of their slopes?

Back

The product of their slopes is -1.