How to find m<1? (picture in detail)

http://farm4.static.flickr.com/3543/5738…

I'm pretty sure m< 3 =34 degrees, and m<2 = 56 degrees. But I am unsure how to find m<1?

<2 is congruent to the other angle in the triangle containing angles 1 and 2, so that makes a total of 112. the sum of the angles of a triangle is 180, so you subtract 112 from 180 and get 68.
m<1=68