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第4課
Author:
LAWSir63
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
算柱 (兩位數)
畫出對稱圖形
小数 的副本
兩位數除以一位數（一）
Discover Resources
GGB研習作品
量度的誤差 Errors in Measurement
Probability animation
包絡線
和两个圆都相切的圆
Discover Topics
Vectors 2D (Two-Dimensional)
Root
Arithmetic Operations
Means
Curve Sketching