Answer:
Step-by-step explanation:
Each central angle represents a side of the polygon.
The number of sides is:
We know in a circle the centre angle is 360°
So number of sides of polygon
[tex]\\ \sf\longmapsto \dfrac{360}{40}[/tex]
[tex]\\ \sf\longmapsto \dfrac{36}{4}[/tex]
[tex]\\ \sf\longmapsto 9[/tex]