In a given regular polygon, the ratio of the exterior angle to the interior angles is 1:3. How many side has the polygon?
- 40
- 5
- 6
-
8
- 12
The correct answer is: D
Explanation
Let x be the exterior angle; interior = 3x; but x + 3x = 180o4x = 180o; x = 45
= \(\frac{360}{45}\) = 8