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Question
Find the number of sides in a regular polygon, if its interior angle is: 160°
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Solution
Let no.of.sides of regular polygon be n.
Each interior angle = 160°
`therefore ("n" - 2)/"n" xx 180^circ = 160^circ`
180n - 360° = 160n
180n - 160n = 360°
20n = 360°
n = 18
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