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fu0 fu6
GeoGebra
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斐波那契螺旋弧线（表格法-可动态调节）
科赫雪花
双心四边形
常见四边形是否是双心四边形
百分數及其應用
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碎形
中考压轴题大放送之十三
內心與角平分線觀察
凹面鏡成像
平移練習
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Special Points
Sine
Translation
Geometric Distribution
Linear Programming or Linear Optimization