Question

How do I solve this?

Answer 1

how do i find a?

Answer 2

are those tine parallel

Answer 3

yes

Answer 4

what you want to do is to think of a new line btw those two lines
that cuts angle a and parallel to the two given lines

Answer 5

so create a line like that?

Answer 6

so we would get a=b+c
since the line are parallel then angle b=70
and angle c=37
by the axioms for two parallel lines

Answer 7

yes something like that