Angle Relationships

Front

What are complementary angles?

Back

Angles that add up to 90°.

Front

What are supplementary angles?

Back

Angles that add up to 180°.

Front

What is the sum of angles in a triangle?

Back

180°.

Front

What is the value of x if two angles are complementary and one angle is 30°?

Back

x = 60°.

Front

What is the value of x if two angles are supplementary and one angle is 110°?

Back

x = 70°.

Front

What are vertical angles?

Back

Angles that are opposite each other when two lines intersect.

Front

What is the value of x if one angle is 45° and the other angle is its complement?

Back

x = 45°.

Front

If two angles are equal and one angle is 50°, what are the angles?

Back

Both angles are 50°.

Front

What is the value of x if two angles are supplementary and one angle is 90°?

Back

x = 90°.

Front

What is the relationship between angles formed by parallel lines and a transversal?

Back

Corresponding angles are equal, and alternate interior angles are equal.