See Problen 10. Developing Proof Supply the missing reasons in the two-column proof.
Given: а || b, c|| d
Prove: 212 23
2
a
с
d
a
1
4
3
b
Statements
Reasons
1) Given
1) a || b
2) Z3 and 22 are supplementary.
3) c || 0
4) 21 and 22 are supplementary.
5) Z1 Z3
2) a. ?
3) Given
4) b. ?
5) c. ?
11. Write a two-column proof for Exercise 10 that does not use 22.
Proof
m2 Justify each answer.
See Problem