[
  "From the previous part, angle BAE = 24 degrees. Since BAE:BAD = 2:5, find the unit value.",
  "2 units = 24 degrees, so 1 unit = 12 degrees. Then angle BAD = 5 x 12 = 60 degrees.",
  "In a trapezium, adjacent interior angles sum to 180 degrees. So angle ADC = 180 - 60 = 120 degrees."
]