Answer:
The correct option is: 40
Step-by-step explanation:
Measure of an arc is actually the measure of the central angle corresponding with that same arc.
Here, the corresponding central angle for arc [tex]\widehat{AB}[/tex] is [tex]\angle1[/tex].
Given that, [tex]m\angle 1= 40[/tex]°
So.....
[tex]m\widehat{AB}=m\angle 1\\ \\ m\widehat{AB}=40\°[/tex]
