S24G6 圓內接正12邊形面積3：用旋轉複製圖形
- Title:
- S24G6 圓內接正12邊形面積3：用旋轉複製圖形
- Duration:
- 02:15
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anchiang chu added a video: S24G6 圓內接正12邊形面積3：用旋轉複製圖形 |
http://www.youtube.com/watch?v=tBUn1rpJbv0
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by anchiang chu
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