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The sum of the interior angles of a polygon is 2160°, find the number of sides in the polygon. |
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Answer» The sum of the interior angles of a polygon = (2n – 4) x 90° ⇒ 2160° = 180°n – 360° ⇒ 2160° + 360° = 180°n ∴ n = 2520°/180° = 14 Hence, number of sides of required polygon is 14. |
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