Answer:
Statements Reasons
1. ABCD is a parallelogram 1. Given
2. Seg. AB is parallel to seg. CD 2. Def of parallelogram
3. Seg. AD is parallel to seg. BC 3. Def of parallelogram
4. Draw seg. BD 4. Between 2 pts there is 1 line
5. <ABD is congr <CDB 5. Alt. Int. < Theorem
6. <BDA is cong <DBC 6. Alt. Int. < Theorem
7. Seg. BD is congr seg. BD 7. Congr. of seg's is reflexive
8. Triangle BAD is congr tr. DCB 8. SAS Postulate
9. AB is congr CD 9. CPCTC
10. BC is congr DA 10. CPCTC
11. AB = CD; BC = DA 11. Def of congr. seg's
