I could solve the first question but got stock in the second one. I have spent so many ours in solving the second one but with no luck. Please help.

QUAD is a trapezoid.

The non parallel sides [QD] and [UA] of the trapezoid are cut by a line parallel to the bases in B and C respectively.

1) Show that QB/BD = UC/CA

Answer:

using Thales' theorem:

QB/BD = QR/RA

UC/CA = QR/RA

Then, QB/BD = UC/CA

2) Find a ratio equal to BC/DA (SHOW YOUR WORK)

PLEASE help with this one!!!