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

A.

20o

B.

40o

C.

90o

D.

140o

View answer & explanation

Correct answer is B

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

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