Answer:
[tex]m<1=156\°[/tex]
[tex]m<2=24\°[/tex]
[tex]m<3=24\°[/tex]
[tex]m<5=156\°[/tex]
Step-by-step explanation:
Part 1) If line a is parallel to line b
then
[tex]m<1=m<4[/tex] -----> by alternate exterior angles
so
we have
[tex]m<4=156\°[/tex]
therefore
[tex]m<1=156\°[/tex]
Part 2) we know that
[tex]m<1+m<2=180\°[/tex] -----> by supplementary angles
we have
[tex]m<1=156\°[/tex]
substitute
[tex]156\°+m<2=180\°[/tex]
[tex]m<2=180\°-156\°=24\°[/tex]
Part 3) If line a is parallel to line b
then
[tex]m<3=m<2[/tex] -----> by alternate interior angles
so
we have
[tex]m<2=24\°[/tex]
therefore
[tex]m<3=24\°[/tex]
Part 4) If line b is parallel to line c
then
[tex]m<5=m<4[/tex] -----> by corresponding angles
so
we have
[tex]m<4=156\°[/tex]
therefore
[tex]m<5=156\°[/tex]
