question_answer

It is given that \[\Delta \,ABC\cong \Delta \,FDE,\] \[AB=4cm,\]\[\,\angle \,B=45{}^\circ \] and \[\angle \,A=80{}^\circ \]. Then which of the following is true?

A)  \[DF=4\,cm,\,\angle F=55{}^\circ \]                  

B)  \[DF=4\,cm,\,\angle E=55{}^\circ \]

C)  \[DE=4\,cm,\,\angle E=55{}^\circ \]     

D)  \[DE=4\,cm,\,\angle D=60{}^\circ \]

E)  None of these