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A regular polygon has 9 sides What is the size ... - WAEC Mathematics 2005 Question

A regular polygon has 9 sides. What is the size of one of its exterior angles?
A
20o
B
40o
C
90o
D
140o
correct option: b

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

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