A) \[x+2y\]
B) \[2x+y\]
C) \[2(x+y)\]
D) \[(x+y)\]
Correct Answer: D
Solution :
Join BD In \[\Delta \,ABD,\] \[\angle ABD+\angle ADB=b\] ?.(i) In \[\Delta \,CBD,\] \[\angle CBD+\angle CDB=a\] ?(ii) Adding Eqs. (i) and (ii), \[\angle ABD+\angle CBD+\angle ADB+\angle CDB\] \[=a+b\] \[\Rightarrow \] \[x+y=a+b\]You need to login to perform this action.
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