A) \[AD=y+5\]
B) \[BC=3x-4\]
C) \[\angle BOC={{90}^{o}}\]
D) None of these
Correct Answer: C
Solution :
\[{{50}^{o}}\] \[{{60}^{o}}\] and \[\angle BAD={{120}^{o}}\] By SSS property \[\angle BCD\]. \[{{240}^{o}}\] ??(1) (CPCT) We have, (\[{{60}^{o}}\] \[{{120}^{o}}\]) \[{{180}^{o}}\] [from 1] \[\angle R={{138}^{o}}\] \[\angle PQS\] \[{{90}^{o}}\] We have, \[{{42}^{o}}\] (\[{{48}^{o}}\] \[\angle BDC={{42}^{o}}\] Linear pair)
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