I'm really having trouble understanding these so me! geometry proving (10 points per question) given ab=cd, bc=da prove abcd is a parallelogram image: second problem given: de bisects ac, bf bisects ac, ae = fc, de = fb prove abcd is a parallelogram image:

First Problem.
Reason 2. Congruence of segments is reflexive.
Statement 3. triangle BCD
Reason 3. SSS
Statement 4. <3, <2
Reason 5. If lines are cut by a transversal such that alternate interior angles are congruent, then the lines a re parallel.
Reason 6. Definition of parallelogram.

Second Problem
Sorry, but the picture is two dark and unclear, and I can't understand it.