A rectangular polygon has 150

^{o}as the size of each interior angle. How many sides has the polygon?-
**A.**

12 -
**B.**

10 -
**C.**

9 -
**D.**

8

##### Correct Answer: Option A

##### Explanation

A rectangular polygon has each interior angle to be 150^{o}

let the polygon has n-sides

therefore, Total interior angle 150 x n = 150n

hence 150n = (2n – 4)90

150n = 180n – 360

360 = (180 – 150)n

30n = 360

n = 12