Angles in Parallel Lines

Front

What are corresponding angles?

Back

Angles that are in the same position on parallel lines in relation to 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 same-side interior angles?

Back

Angles that are on the same side of the transversal and inside the two parallel lines. They are supplementary (add up to 180º).

Front

What is a linear pair of angles?

Back

Two adjacent angles that form a straight line. Their measures add up to 180º.

Front

Calculate the missing angle if one angle is 80º. What is the other angle if they are a linear pair?

Back

100º

Front

If ∡4 and ∡3 are same-side interior angles and ∡4 = 80º, what is ∡3?

Back

100º

Front

Calculate the missing angle if one angle is 53º. What is the other angle if they are corresponding angles?

Back

53º

Front

Solve for x if 2x + 10 = 70.

Back

x = 30

Front

What is the sum of the interior angles of a triangle?

Back

180º.

Front

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

Back

Their measures add up to 90º.