Answer:
24°
Step-by-step explanation:
180° - 156° = 24°
Polygon
If one interior angle = 156°
∴ taking one side of the regular polygon as n we can use the formula as
(n-2)°180/n = 156°
=>180°n -360° = 156°n
=>24°n = 360
=>n = 15
There polygon has 15 sides
