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Question
Find the sum of exterior angle obtained on producing, in order, the side of a polygon with : 10 sides
Solution
No. of sides n = 10
Sum of interior & exterior angles at one vertex = 180°
Sum of all interior & exterior angles = 10 × 180° = 1800°
Sum of interior angles = (n - 2) × 180°
= (10 - 2) × 180°
= 1440°
∴ Sum of exterior angles = 1800° - 1440° = 360°
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