Angle Relationships

Front

What are corresponding angles?

Back

Angles that are in the same position on different parallel lines cut by a transversal. They are equal in measure.

Front

What are alternate interior angles?

Back

Angles that are on opposite sides of the transversal and inside the two parallel lines. They are equal in measure.

Front

What are alternate exterior angles?

Back

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

Front

What are vertical angles?

Back

Angles that are opposite each other when two lines intersect. They are equal in measure.

Front

If Angle 4 is 105 degrees, what is Angle 5?

Back

Angle 5 is 105 degrees because they are alternate interior angles.

Front

If Angle 1 is 100 degrees, what is Angle 8?

Back

Angle 8 is 100 degrees because they are alternate exterior angles.

Front

What is the sum of angles on a straight line?

Back

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

Front

What is the sum of angles in a triangle?

Back

The sum of angles in a triangle is always 180 degrees.

Front

If two angles are supplementary, what is their relationship?

Back

Supplementary angles add up to 180 degrees.

Front

If two angles are complementary, what is their relationship?

Back

Complementary angles add up to 90 degrees.