Question

Complete the two-column proof.

Given: <2 = <4, m<2 = 110
Proof: m<3 = 70

<2 = <4, m<2 = 110 Given
m<2 = m<4 Definition of congruent angles
m<4 = 110 b._______
<3 and <4 are a linear pair Definition of a linear pair(shown in diagram)
<3 and <4 are supplementary Linear Pair postulate
m<3 + m<4 = 180 c.________
m<3 = 70 d._______

Answer 1

(don't see an a. ?)
b. if a=b and b=c then b=c trans
c. def supplementary
d. (idk, algebra? or maybe substitution)

Answer 2

They don't have a.