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1. 
Which is the name of the angle that is less than 90º?
A.
Acute
B.
Right
C.
Obtuse
2. 
Which is the name of the angle that is 90º exactly?
A.
Obtuse
B.
Acute
C.
Right
D.
None of them
3. 
Which is the name of the angle that is greater than 90º but less than 180º?
A.
Acute
B.
Obtuse
C.
Right
D.
None of them
4. 
Is straight angle exactly 180º?
A.
Yes
B.
No
5. 
Which is the size of a reflex angle?
A.
90º
B.
180º
C.
greater than 180º
D.
less than 90º