Let γ,Γ be two concentric circles with radii r,R with r<R. Let ABCD be a cyclic quadrilateral inscribed in γ. If →AB denotes the Ray starting from A and extending indefinitely in B′s direction then Let →AB,→BC,→CD,→DA meet Γ at the points C1,D1,A1,B1 respectively. Prove that [A1B1C1D1][ABCD]≥R2r2 where [.] denotes area.