Answer:
C.
Explanation:
I. If angles 1 and 2 are supplementary, then the sum of their measures is 180.
II. m<1 = 110
Now we can find the measure of <2.
m<1 + m<2 = 180
110 + m<2 = 70
III. m<1 + m<2 + m<3 = 180; m<3 ≠ 0
We know the measures of angles 1 and 2, s we can find the measure of angle 3.
110 + 70 + m<3 = 180
180 + m<3 = 180
m<3 = 0
The measure of angle 3 must be zero according to statements I and II. According to statement III, the measure of angle 3 is not zero.
Answer: C.