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trigonometric ratios
Author:
Sam
GeoGebra
New Resources
錐體建築師
兩位數除以一位數（一）
三位數除以一位數（一）
四邉形 (四年級) 教師版
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七巧板綜合
判斷球體 2
畢氏定理習作
橢圓的定義（by Jutor）
小车
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Plane Figures or Shapes
Differential Equation
Similarity Transformation or Similarity
Scalene Triangles
Variance