Step-by-step explanation:
[tex]< 1\cong < 3[/tex] Vertical angles theorem
[tex]< 2 \cong < 4[/tex] Vertical angles theorem or Transitive Property (since <4 = <3 and <3 = <1 and <1 = <2) so (<4 = <3 = <1 = <2)
<2 = <3 Transitive Property (<3 = <1 = <2)
<3 = <4 Given or Transitive Property
