Answer:
The measure of each angle is [tex]20\°[/tex]
Step-by-step explanation:
see the attached figure to better understand the problem
Let
x------> the angle on each side
we know that
[tex]x\°+140\°+x\°=180\°[/tex]
solve for x
[tex]2x\°=180\°-140\°[/tex]
[tex]2x\°=40\°[/tex]
[tex]x=20\°[/tex]