In the parallelogram ABCD, BC = 2Ab, e is the midpoint of BC, then ∠ AED=______ .

In the parallelogram ABCD, BC = 2Ab, e is the midpoint of BC, then ∠ AED=______ .

Take the midpoint F of AD, connect EF, ∵ parallelogram ABCD, BC = 2Ab, e is the midpoint of BC, ∥ ad ∥ BC, ad = BC = 2Ab = 2be = 2AF = 2DF, ∥ AB = be = AF = DF, ∥ AF = be, AF ∥ be, ∥ quadrilateral afeb is a parallelogram, ∥ EF = AB = AF = DF, ∥ AED = 90 °. So the answer is: 90 °