. Which of the following is a straight angle
A
Angle that is less that 90º
B 
Angle that is exactly 90º
C 
Angle that is greater than 90º
D: None of these
Best Answer
Explanation:
A straight angle exactly measures180º.
But, none of the angles given here have the same measure.
Final answer:
The correct option is D, i.e. None of these.
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