11. In Δ ABC and Δ DEE AB-DE, AB 11 DE, BC-EFand BC II EF. Vertices A, B and C are joined tovertices D, E and F respectively (see Fig. 8.22).Show thatquadrilateral ABED is a parallelogram(ii) quadrilateral BEFC is a parallelogram(iii) AD 11 CF and AD CF(iv) quadrilateral ACFD is a parallelogram(v) AC-DF(vi) Δ ABC Δ DEF.Fig. 8.22

11. In Δ ABC and Δ DEE AB-DE, AB 11 DE, BC-EFand BC II EF. Vertices

1.	11. In Δ ABC and Δ DEE AB-DE, AB 11 DE, BC-EFand BC II EF. Vertices A, B and C are joined tovertices D, E and F respectively (see Fig. 8.22).Show thatquadrilateral ABED is a parallelogram(ii) quadrilateral BEFC is a parallelogram(iii) AD 11 CF and AD CF(iv) quadrilateral ACFD is a parallelogram(v) AC-DF(vi) Δ ABC Δ DEF.Fig. 8.22
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