If the measure of an internal angle is equal to the measure of an external angle of a regular polygon, then the polygon is a -

Square

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Rectangle

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Pentagon

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Octagon

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Both square and rectangle

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Solution

The correct option is A
Square

$\frac{(n - 2) 180^{\circ}}{n}$ = $\frac{2 {\times 180}^{\circ}}{n}$

$n$ = 4 Since it is a regular polygon it is a square.

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