Geometry
posted by Anonymous .
If the measure of ÐDAB = 50°, and ÐDAC = 20°, what is ÐCAB

I have no idea where A, B, C, and D are
You will have to describe the figure. 
Question: 15 of 21:
If the measure of ÐDAB = 50°, and ÐDAC = 20°, what is ÐCAB?
Select one of the options below as your answer:
A.
30°
B.
60°
C.
80°
D.
120° 
30

30