Parallel Lines and Angles

Front

What are parallel lines?

Back

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

Front

What is the slope of parallel lines?

Back

The slope of parallel lines is the same.

Front

What are alternate interior angles?

Back

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

Front

If two parallel lines are cut by a transversal, what can be said about corresponding angles?

Back

Corresponding angles are equal.

Front

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

Back

Consecutive interior angles are supplementary (add up to 180°).

Front

What is the value of x if x + y = 180° and y = 72°?

Back

x = 108°.

Front

If angle x is 76°, what is the measure of its corresponding angle?

Back

The corresponding angle is also 76°.

Front

What is the measure of angle x if it is an alternate angle to angle y, which measures 104°?

Back

Angle x also measures 104°.

Front

What are the properties of vertical angles?

Back

Vertical angles are equal to each other.

Front

If two lines are parallel, what can be said about the angles formed by a transversal?

Back

The angles formed will have specific relationships: alternate interior angles are equal, corresponding angles are equal, and consecutive interior angles are supplementary.