A) \[{{70}^{o}}\]
B) \[{{60}^{o}}\]
C) \[{{50}^{o}}\]
D) \[{{20}^{o}}\]
Correct Answer: C
Solution :
\[\angle AOD=\angle ECO\Rightarrow \angle AO={{70}^{o}}\] So\[\angle BOD={{110}^{o}}\] Hence in\[\Delta BOD\] \[\angle OBD+\angle BOD+\angle ODB={{180}^{o}}\] \[\angle OBD={{180}^{o}}-({{110}^{o}}+{{20}^{o}})\] \[\angle OBD={{50}^{o}}\]You need to login to perform this action.
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