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A decagon has 10 sides, and 10 angles.

The sum of the interior angles of a decagon is (10-2)×180° = 1440°

In a regular decagon all the angles are congruent at 1440° ÷ 10 = 144°

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7y ago
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11y ago

A decagon contains ten sides and ten angles.

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Q: How many sides and angles does a decagon have?
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