Sir/Madam can you please solve question no. (iv)

Dear Student, 

As given : Circle with center A= circle with center Band Arc CD=Arc EF  So , CAD=EBF          Opposite angles of equal arc45-6x°=9x°9x+6x=4515x=45x=3So the EBF=9x=9×3=27° Hence EBF=27°

Regards

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