Which of the following is not the the size of an exterior angle of a...
MATHEMATICS
WAEC 2001
Which of the following is not the the size of an exterior angle of a regular polygon?
- A. 15°
- B. 18°
- C. 20°
- D. 21°
Correct Answer: D. 21°
Explanation
The size of an exterior angle = \(\frac{360}{n}\)
From the options, all options can perfectly divide 360°, except 21°.
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