Solving Parallel Lines & Rules

Front

What is the relationship between angles formed by a transversal cutting parallel lines?

Back

The angles can be congruent or supplementary depending on their positions.

Front

Define corresponding angles.

Back

Corresponding angles are pairs of angles that are in the same position on two parallel lines in relation to a transversal.

Front

What are alternate interior angles?

Back

Alternate interior angles are pairs of angles that lie between the two parallel lines but on opposite sides of the transversal.

Front

What are alternate exterior angles?

Back

Alternate exterior angles are pairs of angles that lie outside the two parallel lines but on opposite sides of the transversal.

Front

Define consecutive interior angles.

Back

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

Front

What are vertical angles?

Back

Vertical angles are the angles opposite each other when two lines intersect. They are always congruent.

Front

If two angles are congruent, what does that mean?

Back

It means that the angles have the same measure.

Front

If two angles are supplementary, what does that mean?

Back

It means that the sum of the angles is 180 degrees.

Front

How do you solve for x when two angles are congruent?

Back

Set the expressions for the angles equal to each other and solve for x.

Front

How do you solve for x when two angles are supplementary?

Back

Add the expressions for the angles together and set the sum equal to 180, then solve for x.