A) \[110{}^\circ \]
B) \[125{}^\circ \]
C) \[130{}^\circ \]
D) \[140{}^\circ \]
Correct Answer: D
Solution :
Let \[\angle PQR=2x\]and \[\angle PRQ=2y\] From \[\Delta PQR\] \[2x+{{70}^{o}}+2y={{180}^{o}}\] or \[2(x+y)={{110}^{o}}\] or \[x+y={{55}^{o}}\] ?.(i) Also, from \[\Delta \,QCR\] \[x+\angle QCR+y={{180}^{o}}\] or \[(x+y)+\angle QCR={{180}^{o}}\] From equation (i), we get \[{{55}^{o}}+\angle QCR={{180}^{o}}\] or \[\angle QCR={{125}^{o}}\]You need to login to perform this action.
You will be redirected in
3 sec