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先估算，後看解釋
Author:
Tse Sir
先估算，後看解釋
New Resources
四邉形 (四年級) 教師版
Earth with coastline
畫出對稱圖形
近似值：有效數字
國旗 (作圖步驟直接餵給 Claude)
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Progressive Formula
未完成
[S2] a revised version of Jane’s GeoGebra file (modified by the author)
Copy of 劉徽的「割圓術」
銳角三角：tan
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Step Functions
Cuboid
Statistics
Polygons
Integers