Step-by-step explanation:
By Exterior Angle theorem,
80° + (6y + 3)° = (155 - 2y)°.
=> 6y + 83 = 155 - 2y
=> 8y = 72
=> y = 9.
Answer:
(6y + 3)° + 80° = (155 - 2y)°
6y + 3 + 80 = 155 - 2y
8y = 155 - 83
y = 9
m∠NML = 57°
m∠NLK = 137°
