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Who am I?
What's my complement?
What's my supplement?
Angle Relationships
Angle Definitions
100
a right angle
What is an angle whose degree measure is exactly 90?
100
40 degrees
What is 50 degrees?
100
100 degrees
What is 80 degrees?
100

Two adjacent angles that are supplementary (add up to 180).

What is a linear pair?

100
angles that add up to 90 degrees
What are complementary angles?
200
an acute angle
What is an angle whose degrees measure is less than 90?
200
60 degrees
What is 30 degrees?
200
60 degrees
What is 120?
200

These angles are on the same side of the transversal and inside the parallel lines. 

What are consecutive interior angles (same-side interior angles)?

200
angles that add up to 180 degrees
What are supplementary angles?
300
an obtuse angle
What is an angle whose degree measure is greater than 90 and less than 180?
300
37 degrees
What is 53 degrees?
300
47 degrees
What is 133 degrees?
300

Angles that are created by intersecting lines and are across from each other (and congruent!)

What are vertical angles?

300
angles are congruent because they are opposite from each other are also called this
What are vertical angles?
400
a straight angle
What is an angle whose degrees measure is exactly 180 and forms a straight line?
400

23 degrees

What is 67 degrees?

400
90 degrees
What is 90?
400

This relationship describes two congruent angles that are in the same relative position to a transversal crossing parallel lines.

What are corresponding angles?

400
angles that are next to each other are called this
What is adjacent?
500
a reflex angle
What is an angle whose degree measure is greater than 180 and less than 360?
500

x

What is 90 - x?

500

7x

What is 180 - 7x?

500

This relationship describes two congruent angles that are on the different sides of the transversal and outside the parallel lines. 

What are alternate exterior angles?

500
transversal
What is the line that cuts across parallel lines?