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144° is the measure of all the ten sides of a decagon. Multiply that number by 10, and you get 1,440° as your final answer. Hope I helped!

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No, you did not help! While the answer is correct, it is about a decagon whereas the question was about a dodecagon. The interior angles of a dodecagon sum to (12-2)*180 = 1800 degrees.

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Q: What do the angles inside a dodecagon add up to?
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