Angles and transversals

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 is the sum of the interior angles of a triangle?

Back

The sum of the interior angles of a triangle is always 180 degrees.

Front

If two angles are supplementary, what is the relationship between their measures?

Back

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

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 value of x if m∠1 = 121 and m∠8 = ?

Back

m∠8 = 121 (because they are corresponding angles).

Front

What are alternate interior angles?

Back

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

Front

If two parallel lines are cut by a transversal, what can be said about the corresponding angles?

Back

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

Front

What is the value of x if m∠3 + m∠4 = 180?

Back

x = 180 - m∠3 (if m∠4 is supplementary to m∠3).

Front

What is the relationship between alternate exterior angles?

Back

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

Front

If m∠5 = 72, what is m∠6 if they are corresponding angles?

Back

m∠6 = 72 (because they are corresponding angles).