Q4 of 26 Page 58

One angle of a regular polygon is 168°. How many sides does it have?

Each interior angle

⇒


⇒ 168°n = 180°n – 360°


⇒ 168°n + 360° = 180°n


⇒ 360° = 180°n – 168°n


⇒ 360° = 12°n


⇒


⇒ n = 30


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