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
\(=\frac{360}{9}=40^{\circ}\)
\(=\frac{360}{9}=40^{\circ}\)
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