Answer:
m<D = 120°
Step-by-step explanation:
Adjacent angles are supplementary in a parallelogram.
Thus:
2x + 12 + 5x = 180°
Collect like terms
7x + 12 = 180
7x = 180 - 12
7x = 168
x = 168/7
x = 24
✔️m<D = 5x° (opposite angles in a parallelogram are equal)
Plug in the value of x
m<D = 5(24)
m<D = 120°
