Practice Work: 3.1 Pairs of Lines and Angles

Front

What are perpendicular lines?

Back

Perpendicular lines are lines that intersect at a right angle (90 degrees).

Front

Define parallel lines.

Back

Parallel lines are lines in a plane that never meet and are always the same distance apart.

Front

What are skew lines?

Back

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

Front

What are coincident lines?

Back

Coincident lines are lines that lie on top of each other, meaning they have all points in common.

Front

What are corresponding angles?

Back

Corresponding angles are angles that are in the same position at each intersection where a straight line crosses two others.

Front

What are consecutive interior angles?

Back

Consecutive interior angles are pairs of angles on the same side of a transversal that lie between two lines.

Front

Identify a pair of perpendicular lines from the following: Lines AC and EF, Lines CG and BF, Lines BF and EF, Lines BD and FH.

Back

Lines BF and EF are perpendicular lines.

Front

What is the relationship between parallel lines and corresponding angles?

Back

When a transversal crosses parallel lines, the corresponding angles are equal.

Front

What is the sum of consecutive interior angles when two parallel lines are cut by a transversal?

Back

The sum of consecutive interior angles is 180 degrees.

Front

How can you identify parallel lines using angles?

Back

If two lines are cut by a transversal and the alternate interior angles are equal, then the lines are parallel.