Posted by Sheila on Thursday, September 5, 2013 at 10:04pm.
ray OB is the bisector of angle AOC and ray OC is the bisector of angle BOD. m<AOD =120 find m<AOB

Geometry  Steve, Thursday, September 5, 2013 at 11:11pm
Since OB bisects AOC, AOB=BOC
Since OC bisects BOD, BOC=COD
So, all 3 angles are equal, and are 120/3 = 40
yeah, I know, the terminology is loose, but you can fill in the appropriate correct language