What is the measure of angle 1?
A: 102 degrees
B: 80 degrees
C: 78 degrees
D: 88 degrees

Answer:
<1 = 78
Step-by-step explanation:
<1 and 102 are supplementary angles so they add to 180 degrees
<1 + 102 = 180
Subtract 102 from each side
<1 + 102 -102 = 180-102
<1 = 78