geometry
posted by noel .
ok, so i don't understand this question. : which postulate justifies the following statement? "exactly one plane contains <(angle)ABC"??? i don't get what i'm supposed to answer and i don't even understand what it's trying to say.
and i've got one aother question about a problem if someone could explain to me. : B is in the interior of <AOC. C is in the interior of <BOD. m<AOD=100 degrees, m<COD= 10 degrees, and m<AOB=m<COD.
my teacher hasn't explained any of this to me no matter how many times i've asked him. so any help will be welcome!!!

The way you stated the first problem and without a diagram to guide us, I don't think you can expect an answer to that one.
For your second, I tried to construct a diagram containing your information.
You don't ask a question about it.
All I could deduce is that <BOC = 80ยบ