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正弦定理的验证
Author:
junfeilx
GeoGebra
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兩組對邊相等和有直角的四邊形
【案例】2013年安徽高考15题
拼砌四邊形
畫出對稱圖形
球體建築師
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小數在數線上的位置
Escher 階梯 (Penrose Stair)
平行2
凸透镜成像
切割圓面積的副本
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Linear Equations
Geometric Transformations
Trapezium
Plane Figures or Shapes
Probability