The prove is completed using two column proof
How to complete the poof
The two column proof is completed below
Statement Reason
∠ BAC ≅ ∠ DCA alternate interior angles are equal
∠ BCA ≅ ∠ DAC alternate interior angles are equal
AC ≅ CA reflexive property
Δ ABC ≅ Δ CDA ASA congruence theorem
AB ≅ CD CPCTC
BC ≅ DA CPCTC