Types of Angles
What is an acute angle?
An angle that is less than 90 degrees.
How do you measure an angle?
By using a protractor.
What are complementary angles?
Two angles whose measures add up to 90 degrees
What are supplementary angles?
Two angles whose measures add up to 180 degrees.
What is an obtuse angle?
An angle that is greater than 90 degrees but less than 180 degrees.
What tool do you use to measure angles?
A protractor
Give an example of complementary angles.
30° and 60°
Give an example of supplementary angles.
110° and 70°.
What is a right angle?
An angle that is exactly 90 degrees.
What is the unit for measuring angles?
Degrees
What is the sum of two complementary angles?
90 degrees
What is the sum of two supplementary angles?
180 degrees.
What is a straight angle?
An angle that is exactly 180 degrees.
How many degrees are in a right angle?
90 degrees
If one angle is 30°, what is the other angle?
60°
If one angle is 120°, what is the other angle?
60°.
Name two types of angles.
Acute and obtuse (or any other correct pair).
What is the angle measurement for a straight angle?
180 degrees
How can you find complementary angles?
Subtract the known angle from 90 degrees
How do you find supplementary angles?
Subtract the known angle from 180 degrees.