4

7) Developing Proof Supply the missing 40 C reasons in the two-column proof. a Given: a || b, cl| d 2 3 Prove: 21 and 24 are supplementary. 4 b Statements Reasons 1) 41 = 42 1) ? 2) old 2) Given 3) 42 and 23 are supplementary. 3) ? 4allb 4) Given 5) 23 = 24 5) ? 6) 21 and 24 are supplementary. 6)