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扇形滾動2
Author:
李春培
扇形滾動2
GeoGebra
New Resources
三位數除以一位數（二）
画直线等分三角形的面积
算柱 (兩位數)
拼砌四邊形
判斷球體
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正弦定理
ie 7
Angle between a Line and a Plane
Quiz on Solving Quadratic Inequalities 解二次不等式：測驗 (v2018)
三方圓三視圖
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Pyramid
Root
Conic Sections
Calculus
Kite