Some trapezium area question

[lPing7]

Since this forum doesn't solve your homework problems fully, I need guidance on how to start this 10th problem

 

[Deleted member 4993]

Since this forum doesn't solve your homework problems fully, I need guidance on how to start this 10th problem

Drop two perpendiculars from C & D onto AB.

Does it show you a path to prove XY = 50 cm?

 

[lPing7]

I guess so. I can do this much. I know YX parallel to DC and AB. but I can't prove it

 

[lPing7]

Better photo