Types of Angles
What is a right angle?
An angle that is 90 degrees.
Two angles are 27 degrees and 36 degrees.
When I put them together what type of angle do I get?
Acute angle
I have an acute angle. When I measure it with the protractor, I see the numbers 80 and 100. This is my measure.
80 degrees
What is an acute angle?
An angle that is less than 90 degrees.
Two angles are 40 degrees and 50 degrees.
When I put them together what type of angle do I get?
Right angle
I am an obtuse angle. When I meaure it with a protractor, I see 60 degrees and 120 degrees. This is my measure.
120 degrees
What is an obtuse angle?
An angle that is greater than 90 degrees and less than 180 degrees.
Two angles are 68 degrees and 135 degrees.
When I put them together what type of angle do I get?
Reflex angle
I am an obtuse angle. When I meaure it with a protractor, I see 45 degrees and 135 degrees. This is my measure.
135 degrees
What is a straight angle?
An angle that is 180 degrees.
Two angles are 98 degrees and 182 degrees.
When I put them together what type of angle do I get?
Straight Angle
I am a reflex angle.
When I measure the outside of the angle I get 90 degrees.
What is the size of the reflex angle?
270 degrees
What is a reflex angle?
An angle that is greater than 180 degrees and less than 360 degrees.
Two angles are 124 degrees and 236 degrees.
When I put them together what type of angle do I get?
Revolution
I am a reflex angle.
When I measure the outside of the angle I get 165 degrees.
What is the size of the reflex angle?
195 degrees