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arist
GeoGebra
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科赫雪花
百分數及其應用
龙形曲线-分形龙
镂空正方体案例对比
比較五件物件的重量
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相似三角形: 重溫
圓形,三角形軌跡觀察
圍周
圓柱截橫
萬花筒
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Algebra
Ellipse
Confidence Interval
Hyperbola
Rotation