Angles and Angle Relationships

Front

What are corresponding angles?

Back

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

Front

What are vertical angles?

Back

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

Front

What are alternate interior angles?

Back

Alternate interior angles are pairs of angles that lie between two parallel lines on opposite sides of a transversal. They are equal in measure.

Front

What are supplementary angles?

Back

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

Front

What are complementary angles?

Back

Complementary angles are two angles whose measures add up to 90 degrees.

Front

If m∠8 = 76°, what is m∠4 if lines are parallel?

Back

m∠4 = 76° (because ∠4 and ∠8 are corresponding angles).

Front

Identify the angle pair: ∠1 and ∠3.

Back

∠1 and ∠3 are vertical angles.

Front

Identify the angle pair: Angle 3 and Angle 6.

Back

Angle 3 and Angle 6 are alternate interior angles.

Front

What is the measure of angles formed by a transversal cutting parallel lines?

Back

The angles formed can be corresponding, alternate interior, alternate exterior, or consecutive interior.

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.