The exterior angle of a polygon is 40°. Calculate:
a) The size of the interior angle.
b) The number of sides of the polygon.
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Step-by-step explanation:
a) Interior angle = 180° - 40° = 140°
b) Let the number of sides of the polygon be n.
As we know,
Sum of all exterior angles= 360°
=> 40° × n = 360°
=> n = 9
The polygon has 9 sides.
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