Is angle ABC =180 degrees? explain

46. Given Z ABD and Z DBC are adjacent angles and A, B, and C are collinear, prove that Z ABD and LDBC are supplementary. D A B PROOF Statement Reason 1. LABD and LDBC 1. are adjacent angles. 2. LABD + LDBC = LABC 2. 3. A, B, and C are collinear. 3. 4. LABC = 180 4. 5. LABD + LDBC = 180 5. 6. LABD and Z DBC 6. are supplementary