As shown in the figure, points a, B and C are on the same straight line, ∠ 1 = ∠ 2, ∠ 3 = ∠ D. try to judge the position relationship between BD and CF, and explain the reason

As shown in the figure, points a, B and C are on the same straight line, ∠ 1 = ∠ 2, ∠ 3 = ∠ D. try to judge the position relationship between BD and CF, and explain the reason

BD ∥ CF, for the following reasons: ∫ 1 = ∥ 2, ∥ ad ∥ BF, ∫ d = ∫ DBF, ∫ 3 = ∫ D, ∫ 3 = ∫ DBF, ∫ BD ∥ CF