Angle Relationships - Parallel lines

Front

What are supplementary angles?

Back

Supplementary angles are two angles whose measures add up to 180 degrees.

Front

What is the relationship between vertical angles?

Back

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

Front

What are alternate interior angles?

Back

Alternate interior angles are pairs of angles that lie on opposite sides of the transversal and inside the two lines. They are equal when the lines are parallel.

Front

What are corresponding angles?

Back

Corresponding angles are pairs of angles that are in the same position on two different parallel lines cut by a transversal. They are equal.

Front

If m∠2 = 123°, what is m∠6?

Back

m∠6 = 123° (because ∠2 and ∠6 are vertical angles).

Front

Which angles are alternate exterior angles?

Back

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

Front

If angle 2 is 70 degrees, what is the measure of angle 4 if they are corresponding angles?

Back

Angle 4 = 70 degrees (because corresponding angles are equal).

Front

What is the sum of the measures of angles on a straight line?

Back

The sum of the measures of angles on a straight line is 180 degrees.

Front

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

Back

When a transversal crosses parallel lines, several angle relationships are formed, including corresponding angles, alternate interior angles, and alternate exterior angles.

Front

What are the measures of angles 1 and 3 if they are supplementary?

Back

The measures of angles 1 and 3 add up to 180 degrees.