Given:
ABCD is

Prove:
A = C

Which of the following statements must be included in this proof?

Triangle ABD congruent to Triangle CDB

Triangle ABC congruent to Triangle CDA

Angle B congruent to angle D

Question

Given: 
ABCD is 

Prove: 
 A =  C

Which of the following statements must be included in this proof?



Triangle ABD congruent to Triangle CDB

Triangle ABC congruent to Triangle CDA

Angle B congruent to angle D

anonymous · Answer

attachment

anonymous · Answer

Well we know ABCD is a parallelogram. If we draw a line through points b d we can cut it in half. Then AB is parallel to CD and therefore ABD is congruent to CDB. Here's a link for help: http://www.algebra.com/algebra/homework/Geometry-proofs/Geometry_proofs.faq.question.411716.html