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Author:
王玉梅
GeoGebra
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兩組對邊相等的四邊形
球體建築師
三位數除以一位數（一）
三位數除以一位數（二）
四邊形的特性
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弦的中點軌跡
HKMO 2008 Question 3 Demonstration (Geometric Construction)
太极图
直角坐標變換：測驗(ALEX CHIK)
冰淇淋
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Optimization Problems
Combinatorics
Incircle or Inscribed Circle
Means
Ratios