uptetd16p2 q130

130If each exterior angle of a regular polygon is 18⁰, then the number of sides of the polygon is

Option : C
Explanation : Sum of all exterior angles of a Polygon = 360⁰
⇒ n × exterior angle = 360⁰
[n = number of sides]
⇒ n × 18⁰ = 360⁰
⇒ n = 360⁰/18⁰ = 20⁰

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