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. 26 What is the missing step in this proof? A. ∠BAC ≅ ∠ACB B. ∠BDE ≅ ∠DEB C. ∠ADE ≅ ∠DEC D. ∠BAC ≅ ∠BDE E. ∠ABC ≅ ∠DBE
