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Question

In a certain polygon, the sum of the measures of all the interior angles is equal to twice that of the exterior angles. The polygon is a.

A
Pentagon
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B
Hexagon
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C
Octagon
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Solution

The correct option is B Hexagon
Given:
Sum of interior angles = 2× the sum of exterior angles
[n= number of sides of the polygon]
(n2)×180=2×360
(n2)=2×360180
(n2)=2×2
n=4+2=6
polygon having 6 sides, hence the polygon is hexagon.

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