Angle Relationships

Front

What are supplementary angles?

Back

Angles that add up to 180°.

Front

What are complementary angles?

Back

Angles that add up to 90°.

Front

What are congruent angles?

Back

Angles that are equal to each other.

Front

What are vertical angles?

Back

Angles that are opposite of each other when lines intersect.

Front

If angle A = 30°, what is the measure of its supplementary angle?

Back

150°.

Front

If angle B = 45°, what is the measure of its complementary angle?

Back

45°.

Front

What is the sum of angles in a triangle?

Back

180°.

Front

If angle 1 = 70° and angle 2 is supplementary to angle 1, what is angle 2?

Back

110°.

Front

If angle 3 = 90°, what type of angle is it?

Back

Right angle.

Front

If angle 4 = 120°, what type of angle is it?

Back

Obtuse angle.