Answer:
141 °
since they are supplementary angles and they always add to 180 °
C
Step-by-step explanation:
<1+<2=180 (angle addition postulate)
<1=39 (given)
39+<2=180 (substitution property)
<2=180-39 (subtraction property)
<2=141 ( simplification)
C, or 141 degrees. Have a nice day!
