A) \[10{}^\circ \]
B) \[20{}^\circ \]
C) \[80{}^\circ \]
D) \[160{}^\circ \]
Correct Answer: C
Solution :
If the angle is \[{{x}^{o}},\] then by hypothesis \[{{x}^{o}}=8({{90}^{o}}-{{x}^{o}})\] \[=720-8{{x}^{o}}\] or \[9{{x}^{o}}={{720}^{o}}\] \[\therefore \] \[x={{80}^{o}}\]You need to login to perform this action.
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