Answer:
b), d)
Step-by-step explanation:
Supplementary angles add up to 180 degrees.
I think that it would be a and d
a and c are both 180 degree angles which is why it could be a, and d because abd and dbc are both 90 degree angles which is why they could be supplementary.
Hope this helps :)
Answer:5,000
lunar model
there really isnt anything to explain