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9 August, 07:52

What is the measure of an exterior angle in a regular dodecagon?

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  1. 9 August, 11:34
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    Duodecagon = 12sides

    so each interior angle = [ (12-2) 180]:12 = 1800:12 = 150°

    so an exterior angle = 180 - interior angle

    = 180-150 = 30°
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