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A regular polygon has 9 sides. What is the size of one of its exterior…

A regular polygon has 9 sides. What is the size of one of its exterior angles?

A.
20^o
B.
40^o
C.
90^o
D.
140^o

Correct Answer: Option B

Explanation

Exterior angle (=frac{360}{n}) where n = no of sides
(=frac{360}{9}=40^{circ})