A) \[\angle ABC\] is an obtuse angle and is greater than \[{{90}^{o}}.\]
B) \[\angle ABC\] is a right angle and is equal to \[{{90}^{o}}.\]
C) \[\angle ABC\] is an obtuse angle and is less than \[{{90}^{o}}.\]
D) \[\angle ABC\] is an acute angle and is less than \[{{90}^{o}}.\]
Correct Answer: A
Solution :
An obtuse angle is greater than\[{{90}^{o}}\]. A right angle is equal to\[{{90}^{o}}\]. An acute angle is less than\[90{}^\circ \]. Hence only A is true.
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