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Author:
chen mingchuan
GeoGebra
New Resources
四邉形 (四年級) 教師版
拼砌四邊形
兩位數除以一位數（二）
球體建築師
兩位數加法
Discover Resources
Locus 軌跡(1T)
畢式定理 (05)
Copy of 劉徽的「割圓術」
Wave Interference
Mathematics and Optics (and their applications)
Discover Topics
Probability
Tree Diagrams
Upper and Lower Sum or Riemann Sum
Triangles
Geometry