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Each interior angle of a regular decagon is

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Each interior angle of a regular decagon is

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In Regular Decagon, all sides are of same size and measure of all interior angles are same.

The sum of interior angles of decagon is

= (n – 2) × 180° [n is number of sides of polygon)]

= (10 – 2) X 180°

= 1440°.

Each interior angle = 1440/10

= 144°

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