Respuesta :

darkcastviolet

Answer:

I'm pretty sure its 80°

Step-by-step explanation:
Because C is 10 degrees, A is also 10 degrees. The total degrees from all the angles in a parallelogram makes 180 degrees. So B and D are together 180-20=160 degrees. The angles B and D are even big, so B will be 160/2=80 degrees