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Author:
haozhan
GeoGebra
New Resources
sanjiaohanshu
算柱 (兩位數)
判斷球體
兩位數除以一位數（二）
兩位數加法
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Translation 平移變換
劉徽的「割圓術」
Normal Vector
地球儀
橢圓2--四圓心近似法
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General Quadrilateral
Vectors
Solids or 3D Shapes
Curve Sketching
Inequalities