Answer:
degrees.
Step-by-step explanation:
Line ABC is a straight line, and the angle on a straight line is always 180 degrees.
Since ABD + DBC = ABC, we know that 

Divide both sides by 9:

DBC is
degrees.
Answer:
false
Step-by-step explanation:
i just took the test and guessed on it to help u ( i got it right) :p
Answer:
The sign would remain the same.
It would have the same value.
ED2021