A regular polygon has 9 sides. What is the size of one of its exterior angles?
A
20o
B
40o
C
90o
D
140o
Verified Correct Answer: B.
Step-by-Step Mathematical Solution
Exterior angle \(=\frac{360}{n}\) where n = no of sides
\(=\frac{360}{9}=40^{\circ}\)
Source: Myschool Past Questions Archive (Record #26702)