11/12 - FLASHCARD - 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 are supplementary angles?

Back

Supplementary angles are two angles that add up to 180°.

Front

What are complementary angles?

Back

Complementary angles are two angles that add up to 90°.

Front

What are corresponding angles?

Back

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

Front

What are alternate interior angles?

Back

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

Front

What are same-side interior angles?

Back

Same-side interior angles are angles that lie between two parallel lines on the same side of a transversal. They are supplementary.

Front

If angle 8 measures 23 degrees, what is the measure of angle 5 if they are same-side interior angles?

Back

Angle 5 measures 157 degrees.

Front

If angle 4 is 49 degrees, what is the measure of angle 1 if they are alternate interior angles?

Back

Angle 1 measures 49 degrees.

Front

What is a linear pair of angles?

Back

A linear pair of angles are two adjacent angles that form a straight line. They are supplementary.

Front

If two angles are vertical angles, what can we say about their measures?

Back

Vertical angles are always equal in measure.