Q. 140

# The ration betwee

Given, the ratio between exterior angle and interior angle is

1:2.

Let, exterior angle = x

And, interior angle = 5x

Sum of exterior and interior angle is equal to 180.

Hence, x + 5x = 180

6x = 180

x = 30

Total measure of all the exterior angle = 360

Measure of each exterior angle = 30

Therefore, the number of all exterior angles

Hence, the polygon has 12 sides.

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