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陳隆期
GeoGebra
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折扣
斐波那契螺旋弧线（表格法）
撒针估算面积实验
双心四边形
龙形曲线-分形龙
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外心垂心問題
基礎作圖2
圓所形成的三角形
圓周公式應用題2的副本
凸多边形在直线上的滚动
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Congruence
Real Numbers
Parallelogram
Linear Functions
Percentages