A) \[{{120}^{o}}\]
B) \[{{180}^{o}}\]
C) \[\angle R={{138}^{o}}\]
D) \[{{90}^{o}}\]
Correct Answer: D
Solution :
\[\Rightarrow \] or \[\angle 1+\angle 2+\angle 3={{180}^{o}}\] Alternate Method: In triangle, OAB, since sum of angles is\[\Rightarrow \], we have \[BD=CD\]You need to login to perform this action.
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