Respuesta :
11: B
12: C
They are both supplementary angles meaning they add to 180 degrees
12: C
They are both supplementary angles meaning they add to 180 degrees
For 11, angles 1 and 2 must be supplementary, which means the sum of the two angles is 180° is the correct answer.
For 12, the answer would be 120° because 180° - 60° = 120°
For 12, the answer would be 120° because 180° - 60° = 120°