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Each exterior angle of a regular polygon with 9 sides measures:
A20°
B40°
C60°
D80°
Answer & Solution
Correct answer: B. 40°
Sum of exterior angles = 360°. In a regular polygon all exterior angles are equal, so each = 360° ÷ 9 = 40°. (Hence each interior angle = 180° − 40° = 140°.)
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