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Pappus 定理
Author:
Jia-ming Shiu
Pappus 定理
GeoGebra
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兩組對邊相等的四邊形
畫出對稱圖形
算柱 (兩位數)
四邉形 (四年級) 教師版
四邊形的特性
Discover Resources
立方體截痕
活動工作紙LEVEL03
勝者即正義
正六邊形串珠
黄金三角形到螺旋线（表格法）
Discover Topics
Subtraction
Symmetry
Equations
Secant Line or Secant
Right Triangles