Angle Relationships

Front

What is the value of x if the equation is x + 5 = 16?

Back

11

Front

What are adjacent angles?

Back

Angles that share a common side and vertex, and do not overlap.

Front

What does the Triangle Sum Theorem state?

Back

The sum of all angles in a triangle is 180°.

Front

Define vertical angles.

Back

Angles that are opposite of each other when two lines intersect.

Front

What type of angle measures 180°?

Back

Straight angle.

Front

What are complementary angles?

Back

Two angles whose sum is 90°.

Front

What are supplementary angles?

Back

Two angles whose sum is 180°.

Front

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

Back

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

Front

What is an acute angle?

Back

An angle that measures less than 90°.

Front

What is an obtuse angle?

Back

An angle that measures more than 90° but less than 180°.