Answer:
m<BCA+m<BCD=180
Step-by-step explanation:
supplementary means that the angle measures add up to 180°, if you are using the definition of supplementary angles AND you have had a statement saying that two angles are supplementary, ALWAYS follow it with the sum of the measures of those angles equal 180 :)
Is there a picture to go with it
Explanation:
AB=7
AC=9
You are looking for R
7+9=16
So R is 16
Answer:
40
Step-by-step explanation:
because vertical angles are equal
3×40=120