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賺賠：例1的副本
Author:
冯圣军
,
GeoGebra Institute of Hong Kong
賺賠
GeoGebra
New Resources
兩位數除以一位數（二）
錐體建築師
四邉形 (四年級) 教師版
画直线等分三角形的面积
球體建築師
Discover Resources
圆锥的侧面展开图3D动画
分數與小數
線段前後分割
Geometry: Types of Angles 2 (幾何：角的種類 2)
Tangent properties
Discover Topics
Variance
Differential Calculus
Angles
Ratios
Tangent Line or Tangent