Given: ΔABC with Prove: Statement Reason 1. given 2. Addition Property of Equality 3. using common denominators 4. AB = AD + DB CB = CE + EB segment addition 5. Substitution Property of Equality 6. ∠ABC ≅ ∠DBE Reflexive Property of Congruence 7. ΔABC ~ ΔDBE SAS similarity criterion 8. Corresponding angles of similar triangles are congruent. 9. If the corresponding angles formed by two lines cut by a transversal are congruent, then the lines are parallel. Question 19 of 44 What is the missing step in this proof? ∠BAC ≅ ∠ACB ∠BDE ≅ ∠DEB ∠ADE ≅ ∠DEC ∠BAC ≅ ∠BDE ∠ABC ≅ ∠DBE NextReset