Inside the flattened angle AOB, two rays OD and OC are drawn so that the angle AOC = 130 degrees

Inside the flattened angle AOB, two rays OD and OC are drawn so that the angle AOC = 130 degrees, and the angle DOB = 120 degrees, find the angle DOC.

A flattened angle is an angle whose sides make up a straight line.
The degree measure of the flattened angle is.
the angle AOB is expanded and is equal to 180 degrees.
The AOC angle is 130 degrees, so the AOC angle = 180-130 = 50 degrees.
The DOB angle is 120 degrees and the COB angle is 50 degrees.
To find the angle DОС it is necessary to subtract the angle COB = 120-50 = 70 degrees from the DОВ angle.