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Author:
zhangweiqiao
GeoGebra
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撒针估算面积实验
龙形曲线-分形龙
比較五件物件的重量
科氏力 (Coriolis Force)
科赫雪花
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商高定理1
百分數(小學):折扣 / 賺賠(Java 版)
正方體摺紙圖樣的旋轉及反射
菱形的特性
反射(鉛垂線、水平線及斜線) Reflection (vertical line, horizontal line and line)
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Sphere
Centroid or Barycenter
Line Segment
Rhombus
Congruence