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Question

The ratio between the exterior angle and the interior angle of a regular polygon is 1:5,then it has ___ sides.
  1. 12


Solution

The correct option is A 12

Let the exterior angle =x and interior angle =5x

We know that i+e=180

5x+x=180

6x=180

x=30

e=30

The number of sides n=360e

n=36030

n=12

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