Bunuel wrote:
Note: Figure not drawn toscale.
In the figure above, AD||BC, AB = 6 cm and AD = 7 cm. If 2*∠BCD = ∠BAD, what is the length of BC in cm?
(A) 12
(B) 13
(C) 19
(D) 20
(E) Cannot bedetermined
If we make angle A 90 degrees, that makes angle C 45 degrees. Drawing a vertical line up from D, it intersects BC such that the left portion of BC is 7 and the right portion of BC is 6. Thus BC = 13.
If we make AB lean 30 degrees to
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