Correct Answer - Option 3 : 10
Given:
The Sum of all interior angles of a polygon is 1400°
Formula used:
Sum of interior angles of a regular polygon of side 'n' = (n - 2) × 180°
Calculation:
Let number of sides of the polygon is n
(n - 2) × 180 = 1440
⇒ n - 2 = 8
⇒ n = 10
∴ number of sides of the polygon is 10
