1. <2 congruent <4 Given
2. m<2 =m<4 Angle congruence postulate
3. <2 and <3 are supplementary
4. m<2+m<3=180 Definition of supplementary angles
5. m<1 and m<4 are supplementary
6. m<1+m<4=180 Definition of supplementary angles
7. m<1 + m<4 = m<2 + m<3
8. m<1 + m<4 = m<4 + m<3
9. m<1 = m<3
10. <1 congruent with = and little line on top of the equal <3

help me with 5,7,8,9,10
pizz thanx