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The interior angle of a regular polygon is $156$ . Find the number of sides of the polygon.
Given: The interior angle of a regular polygon is $156$
To do: Find the number of sides of the polygon
Answer:
The sum of interior angles of a regular polygon of n sides is given by $(n - 2)180°$
Given an angle of the regular polygon = $156°$
Sum of angles of the polygon = $156n = (n - 2) $\times$ 180°$
$180n - 360 = 156n$
$180n - 156n = 360°$
$24n = 360°$
n = $\frac{360}{24}$ = 15
So the required polygon has 15 sides.
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