Are the edges of parallelogram ABCD ad = 2Ab, AE = BF = AB, EC intersecting ad at m, FD intersecting BC at n, and quadrilateral CDMN diamond? Explain the reason emergency

∵ be = BC = 2Ab, ∵ e = ∵ ECB. ∵ BC ∥ ad, ∵ ECB = ∵ DGC ∵ DGC = ∵ e, ∵ ab ∥ CD, ∵ DCG = ∵ e ∵ DGC = ∵ DCG, ∵ DG = DC, the same as ∵ GDF = ∵ CDF = ∵ f. ≁ CE ⊥ DF

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