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24剑154第5题抛物线动点面积最大及菱形
Author:
小南
GeoGebra
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常见四边形是否是双心四边形
直線的斜率
球体的体积推导（优化版）
祖冲之的期望：内棋与外棋
直線的斜率：水平變化 & 鉛垂變化
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北區模考非選第二題 (2014.03.06)
兩位小數GAME
曲線上的箭頭 (Arrow on Curve)
Test
圓錐曲線
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Multiplication
Ellipse
Linear Functions
Scatter Plot
Differential Equation