If each interior angle of a regular polygon is 150°, the

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If each interior angle of a regular polygon is 150°, the number of sides of the polygon is

Given , each interior angle of a regular polygon = 150°,
If the number of sides of regular polygon be n, then

(2n - 4) × 90°	= 150°
n

⇒ 3(2n – 4) = 5n
⇒ 6n – 12 = 5n
⇒ n = 12.