Respuesta :

Answer:

D. 50 degrees

Step-by-step explanation:

b = 180 - (32+69+29) = 180 - 130 = 50

Answer: option D. 50°

Step-by-step explanation:

69 + b +32 + 29 = 180(angle on a straight line

130 + b = 180

b = 180 — 130 = 50°