11D Angles formed by Parallel Lines and a Transversal

Front

What are alternate exterior angles?

Back

Angles that are on opposite sides of the transversal and outside the two parallel lines. They are congruent.

Front

What are corresponding angles?

Back

Angles that are in the same position on two parallel lines cut by a transversal. They are congruent.

Front

What is the sum of the interior angles of a triangle?

Back

The sum is always 180°.

Front

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

Back

They are congruent.

Front

What is the definition of a transversal?

Back

A line that intersects two or more lines at different points.

Front

What is the relationship between supplementary angles?

Back

Two angles are supplementary if the sum of their measures is 180°.

Front

If the measure of angle A is 65°, what is the measure of its supplement?

Back

The supplement of angle A is 115°.

Front

What are vertical angles?

Back

Angles that are opposite each other when two lines intersect. They are congruent.

Front

If angle 5 is 80°, what is the measure of angle 6 if they are corresponding angles?

Back

Angle 6 is also 80°.

Front

What is the relationship between alternate interior angles?

Back

They are congruent when two parallel lines are cut by a transversal.