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in a regular polygon, each interior angle is twice the exterior angle. the number of sides of the polygon is _________ |
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Answer» Answer: 8 or OCTAGONStep-by-step explanation: Concept : Sum of Interior angle + Sum of Exterior angle = 180° Let the interior angle be 'x' => Exterior angle = 3 * Interior angle = 3 x => x + 3x = 180° => 4x = 180° => x = 180 / 4 => x = 45° We also know that, Exterior angle = 360° / n Where n represents the number of sides of a polygon. => n = 360° / Exterior angle => n = 360° / 45° => n = 8 Hence it is a 8 sided polygon which is an octagon. |
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