1: The best statement for reason 6 of this proof is -∠A ≅ ∠C
 -∠B ≅ ∠D
 -∠B and ∠D are supplements
 -∠B ≅ ∠B 
2.The best reason for statements 3.5. and 7 in this proof is
 - Alternate interior angles are congruent.
 -Corresponding angles are congruent. 
-Alternate exterior angles are congruent.
 -Interior angles on the same sides of a transversal are supplements. 
3. The best statement for reason 8 of this proof is
 -∠B ≅ ∠B -∠A and ∠C are supplements.
 -∠B ≅ ∠D 
-∠A ≅ ∠C
                                             
                                          
                                          
                                        
											