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# Angle Relationships

### Vocabulary Terms for Angle Relationships

An angle that measures less than 90 degrees is called an Acute Angle
An angle that measures exactly 90 degrees is called a Right Angle
An angle that measures more than 90 degrees is called an Obtuse Angle
An angle that measures exactly 180 degrees is called a Straight Angle
Two angles that are opposite from each other and congruent are called Vertical Angles
Two or more angles that have a sum of 180 degrees are Supplementary Angles
Two or more angles that have a sum of 90 degrees are Complementary Angles
A right angle measures exactly 90 degrees
A straight angle measures exactly 180 degrees
An acute angle measures Less than 90 degrees
An obtuse angle measures Greater than 180 degrees
Supplementary angles Add up to 180 degrees
Complementary angles Add up to 90 degrees
Vertical angles are Congruent
If Angle A is 50 degrees, what is the measure of its supplement? 130 degrees
If Angle A is 25 degrees, what is the measure of the angle that is vertical to it? 25 degrees
If Angle A is 20 degrees, what is the measure of its complement? 70 degrees
What is the measure of an angle that is congruent to 80 degrees? 80 degrees
If Angle A is 70 degrees, what is the measure of its supplement? 110 degrees
If Angle A is 60 degrees, what is the measure of its complement? 30 degrees
If Angle A is 145 degrees, what is the value of its vertical angle? 145 degrees
If Angle A is 80 degrees, what is the measure of its supplement? 100 degrees
Created by: jgarrettmcms