A) \[{{4}^{o}}\]
B) \[{{5}^{o}}\]
C) \[{{6}^{o}}\]
D) \[{{8}^{o}}\]
Correct Answer: C
Solution :
\[\angle P+\angle Q+\angle R={{180}^{o}}\] \[\Rightarrow \]\[12x+{{8}^{o}}+{{55}^{o}}+8x-{{3}^{o}}={{180}^{o}}\] \[\Rightarrow \]\[20x+{{60}^{o}}={{180}^{o}}\] \[\Rightarrow \]\[20x={{120}^{o}}\Rightarrow x={{6}^{o}}\]
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