Angle relationships

Front

What are supplementary angles?

Back

Angles that add up to 180°.

Front

What are vertical angles?

Back

Vertical angles are angles that are opposite each other when two lines intersect and are always congruent (equal measures).

Front

What is the relationship of alternate exterior angles?

Back

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

Front

What is the sum of the angles in a triangle?

Back

The sum of the angles in a triangle is always 180°.

Front

What are complementary angles?

Back

Angles that add up to 90°.

Front

If two angles are supplementary and one angle measures 70°, what is the measure of the other angle?

Back

110°.

Front

What is the definition of adjacent angles?

Back

Adjacent angles are two angles that share a common side and a common vertex.

Front

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

Back

Vertical angles are always congruent (equal measures).

Front

What is the relationship of corresponding angles?

Back

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

Front

If angle A measures 45°, what is the measure of its supplementary angle?

Back

135°.