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相似三角形條件 - 三邊成比例
Author:
AaronLau
GeoGebra
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龙形曲线-分形龙
双心四边形
正方形雪花图案
椭圆内切圆链
异形操场
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GeoGebra 動畫開關按鈕製作
垂心即內心
球體建築師
雙曲線之極偶 / polarity for hyperbola
P6數學
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Quadrilaterals
Area
Circle
Polynomial Functions
Trigonometry