1 .	If each interior angle is double of each exterior angle of a regular polygon with n sides, then the value of nis –
[ A ]    5 [ B ]    6 [ C ]    8 [ D ]    10
Answer : Option B Explanation : ATQ, External angle = x Internal angle = 2x So, External angle (x) =$186°\over2+1$= 60° So, the number of sides = $360°\over60$= 6
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