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梯形面積(求上底)
Author:
lkkbmaths teachers 檔案儲存用
GeoGebra
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画直线等分三角形的面积
平行線的斜率
球体的体积推导（优化版）
斜率的值
探究三角形的全等條件
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美麗的剪紙
線型函數與圖形
test
圆锥曲线
三角形三边关系
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Logic
Exponent
Derivative
Addition
Stochastic Process or Random Process