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正弦定理的证明
Author:
梁航宇
GeoGebra
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找出對稱軸
兩組對邊相等的四邊形
拼砌四邊形
四邉形 (四年級) 教師版
三位數除以一位數（二）
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三角形全等的理由 – 題4
工具：PlaneString
圖形的周界 3
圓與弦2的副本
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Variance
Plane Figures or Shapes
Integral Calculus
Cube
Integers