Triangles A B C and D B C share common side B C. Sides A C and C D are congruent. In order to prove △ABC ≅ △DBC by SAS, what additional information must be given? ∠ABC ≅ ∠DBC AB ≅ DB ∠ACB ≅ ∠DCB BC ≅ BC

“exterior angles of triangles. an exterior (or external) angle is the angle between one side of a triangle and the extension of an adjacent side. try this drag the orange dots on any vertex to reshape the triangle.” look to get to the answer i explained what it means and other things i hope it you .