Answer:
B
Step-by-step explanation:
We can use the formula for interior angles of a polygon to solve this. The formula is:
Each interior angle of a polygon = [tex]\frac{(n-2)180}{n}[/tex]
Where n is the number of sides
We know each angle is 140°, so we plug that in and find n:
[tex]140=\frac{(n-2)180}{n}\\140n=180n-360\\180n-140n=360\\40n=360\\n=\frac{360}{40}=9[/tex]
The polygon has 9 sides, correct answer B.
