Parallel, perpendicular, skew lines

Front

What are parallel lines?

Back

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

Front

What are perpendicular lines?

Back

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

Front

What are skew lines?

Back

Lines that do not intersect and are not parallel, existing in different planes.

Front

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

Back

The slopes of parallel lines are equal.

Front

If line FG is perpendicular to line AB, what is the relationship between their slopes?

Back

The product of their slopes is -1.

Front

What is the angle relationship when two parallel lines are cut by a transversal?

Back

Corresponding angles are equal.

Front

What is an example of skew lines in real life?

Back

The edges of a staircase and the floor are skew lines.

Front

How can you identify parallel lines in a diagram?

Back

Look for arrows on the lines indicating they are parallel.

Front

What is the definition of corresponding angles?

Back

Angles that are in the same position on different parallel lines cut by a transversal.

Front

What is the definition of alternate interior angles?

Back

Angles that are on opposite sides of the transversal and inside the parallel lines.