Xiao Ming didn't take his homework seriously. He took 6 as 0 and 1 as 7. The result is 137. Do you know the correct answer?

137 + 70 = 207207-16 = 191 A: the correct number is 191

As shown in the figure, in the trapezoidal ABCD, ab ‖ DC, DB bisects ∠ ADC, passes through point a as AE ‖ BD, intersects the extension line of CD at point E, and ∠ C = 2 ∠ E. (1) prove that the trapezoidal ABCD is isosceles trapezoid; (2) if ∠ BDC = 30 ° ad = 5, find the length of CD

(1) It is proved that: ∵ AE ∥ BD, ∵ e = ∵ BDC. ∵ DB bisects ∵ ADC, ∵ ADC = 2 ∵ BDC. And ∵ C = 2 ∵ e, ∵ ADC = ∵ BCD.

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