<1) 112
<2) 68
<3) 90
<4) 90
<5) 22
<6) 158
For <4 and <2: vertical angles
For <1, <3 and <6: supplementary
For <5: since we know the measures of angles 2 and 4 and they're in a triangle with 5, when they are all added together they must equal to 180 degrees.
