As shown in the figure, in the known trapezoidal ABCD, ad ‖ BC, BC = 3aD, e is a point on the waist AB, connecting CE, (1) if CE ⊥ AB, ab = CD, be = 3aE, find the degree of ∠ B; (2) let the area of △ BCE and quadrilateral AECD be S1 and S2 respectively, and 2S1 = 3s2, try to find the value of beae

As shown in the figure, in the known trapezoidal ABCD, ad ‖ BC, BC = 3aD, e is a point on the waist AB, connecting CE, (1) if CE ⊥ AB, ab = CD, be = 3aE, find the degree of ∠ B; (2) let the area of △ BCE and quadrilateral AECD be S1 and S2 respectively, and 2S1 = 3s2, try to find the value of beae

(1) As shown in Figure 1: ∵ ad ∥ BC, ∥ mad ∥ MBC, ∥ ADBC = Mamb = 13. ∥ MB = 3mA. Let Ma = 2x, then MB = 6x. ∥ AB = 4x. ∥ be = 3aE, ∥ be = 3x, AE = X. ∥ be = EM = 3x, e is the midpoint of MB