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Each interior angle of a regular polygon is 108°. How many sides has it?

Mathematics
WAEC 2004

Each interior angle of a regular polygon is 108°. How many sides has it?

  • A. 5
  • B. 7
  • C. 9
  • D. 14
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Correct Answer: Option A
Explanation

The exterior angle of the polygon = 180 – 108 = 72°. The sum of exterior angle of the regular polygon = 360°
The number of sides \(=\frac{360}{72}=5\)

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