Angle Relationships with Parallel Lines & Transversals

Front

What is the Vertical Angles Theorem?

Back

When two lines intersect, the angles opposite each other are equal.

Front

What is the Corresponding Angles Theorem?

Back

When a transversal crosses two parallel lines, the angles in matching corners are equal.

Front

What is the Alternate Exterior Angles Theorem?

Back

When a transversal crosses two parallel lines, the angles on opposite sides of the transversal and outside the parallel lines are equal.

Front

What is the Alternate Interior Angles Theorem?

Back

When a transversal crosses two parallel lines, the angles on opposite sides of the transversal and inside the parallel lines are equal.

Front

What is the Same Side Interior Angles Postulate?

Back

When a transversal crosses two parallel lines, the interior angles on the same side of the transversal are supplementary (add up to 180 degrees).

Front

What is a Linear Pair of Angles?

Back

Two adjacent angles that form a straight line and are supplementary.

Front

Define Supplementary Angles.

Back

Two angles that add up to 180 degrees.

Front

Define Complementary Angles.

Back

Two angles that add up to 90 degrees.

Front

What is the relationship between angle 10 and angle 13 if they are vertical angles?

Back

Angle 10 is equal to angle 13.

Front

What is the relationship between angle 2 and angle 4 if they are corresponding angles?

Back

Angle 2 is equal to angle 4.