Angle Relationships

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 is the relationship between Alternate Interior Angles?

Back

Alternate interior angles are equal when two parallel lines are cut by a transversal.

Front

Define Corresponding Angles.

Back

Corresponding angles are the angles that are in the same position at each intersection where a straight line crosses two others. They are equal when the lines are parallel.

Front

What are Supplementary Angles?

Back

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

Front

If m∠1 = 30°, what is m∠3 if ∠1 and ∠3 are vertical angles?

Back

m∠3 = 30° (Vertical angles are equal).

Front

What is the value of x if the angles are supplementary and one angle is 19°?

Back

x = 180° - 19° = 161°.

Front

Identify the angle relationship: If two angles are on the same side of the transversal and inside the parallel lines, what are they called?

Back

They are called Consecutive Interior Angles.

Front

What is the sum of the measures of two complementary angles?

Back

The sum is 90 degrees.

Front

If m∠2 = 60°, what is m∠4 if ∠2 and ∠4 are corresponding angles?

Back

m∠4 = 60° (Corresponding angles are equal).

Front

What is the relationship between Alternate Exterior Angles?

Back

Alternate exterior angles are equal when two parallel lines are cut by a transversal.