True.
angle1 = angle 2=20 degrees
Step-by-step explanation
Step 1
Let
angle COA ( it goes from 40 to 80 degrees)(from A to C), then
angle COA= 80 degrees - 40 degrees
angle COA= 40 degrees
Step 2
ray OB divides 2 COA into two angles
angle 1 =BOA 0 it goes from 40 to 60
angle |= BOA=20 degrees
ray OB divides 2 COA into two angles
angle 2 =COB 0 it goes from 60 to 80
angle 2= COB=20 degrees
then
angle1 = angle 2=20 degrees
therefore
ray OB divides 2 COA into two angles of equal measure