Answer:
27-degrees
Step-by-step explanation:
these are vertical angles which are equal to each other *congruent
39 + k = 66 --> *subtract 39 from both sides*
k = 27
27°
Remember the angle opposite of another angle in two straight lines are equal
So 66=39+k
Then put k by itself by subtracting 39 from both sides
66-39=k
k=27°
