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Step-by-step explanation:
The sum of the interior angles of a polygon is
four times the sum of its exterior angles.
The sum of the exterior angles of a polygon is
always equal to 360°.
The sum of the interior angles of polygon
= 180(n-2)
• 180(n-2)=4x360
or, n-2=8
or, n=10
Number of sides in the polygon = 10
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