As shown in the figure, in △ ABC, ∠ C = 90 °, the vertical bisector of AB intersects at point D, AB intersects at point E, the degree ratio of ∠ DAE and ∠ DAC is 2:1, and the degree of ∠ B is calculated

As shown in the figure, in △ ABC, ∠ C = 90 °, the vertical bisector of AB intersects at point D, AB intersects at point E, the degree ratio of ∠ DAE and ∠ DAC is 2:1, and the degree of ∠ B is calculated

∵ D is the point on the vertical bisector of line AB, ∵ ad = BD, ∵ △ DAB is isosceles triangle, ∵ B = ∵ DAB, ∵ DAE and ∵ DAC degree ratio is 2:1, ∵ if ∵ DAC = x, then ∵ B =