Description
正12边形,通过分割,重组,可以直接得出,12边形的面积为3倍的外接圆半径平方。
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You are prohibited from sharing, sub-licensing, selling, renting, hosting, transferring, or distributing the digital file or 3D printed versions of this object, as well as any other derivative work in either digital or physical form (including remixes).You are not allowed to use the objects in any manner that involves charging money or collecting fees without permission.

