What do we call an angle which exactly measures \[{{90}^{o}}\]? �

1.	What do we call an angle which exactly measures \[{{90}^{o}}\]?
A.	An obtuse angle
B.	An acute angle
C.	A right angle
D.	A reflex angle
Answer» D. A reflex angle

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What do we call an angle which exactly measures \[{{90}^{o}}\]?

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