it's a two-column proof problem...

says prove Line AD is congruent with line BC.

http://img383.imageshack.us/img383/8...elagramym0.jpg

Statement | Proof

AD parallel with BC | given

DC parallel AB | given

??

using the given,which angles are congruent considering the two parallel lines are cut by the transversal? and what is the specific term for that anyway?

Thanks for any help, guys.