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Question

Is it possible to have a regular polygon whose each interior angle is :
138o

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Solution

Suppose polygon has n side
The sum of interior angles
=(n2)×180o
each exterior angles is =(n2)×180n
So n×45o
180n360=45n
135 n=360orn=360o135=83
As n should be +ve integrate, so it is not possible to have such a polygon.

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