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Question
Find the sum of exterior angle obtained on producing, in order, the side of a polygon with: 7 sides
Solution
No. of sides n = 7
Sum of interior & exterior angles at one vertex = 180°
Sum of all interior & exterior angles = 7 × 180° = 1260°
Sum of interior angles = (n − 2) × 180°
= (7 − 2) × 180°
= 900°
∴ Sum of exterior angles = 1260° − 900°
= 360°
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