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Author:
Ricky Chan
GeoGebra
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兩位數除以一位數（二）
算柱 (兩位數)
画直线等分三角形的面积
球體建築師
柱體建築師
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二次涵数的图象y=ax^2+b
正方形面積
圖形周界_2
圆锥侧面展开图
相反数 思考（教材第10页）
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Quadratic Equations
Unit Circle
Plane Figures or Shapes
Frequency Distribution
Linear Programming or Linear Optimization