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ie 7
Author:
LAM YU SANG
GeoGebra
New Resources
判斷球體
小数 的副本
找出對稱軸
兩組對邊相等和有直角的四邊形
柱體建築師
Discover Resources
第三冊
Dilate 習作
不規則圖形的周界(intro)
BkD_act15_03c
平移法（一）
Discover Topics
Addition
Frequency Distribution
Incircle or Inscribed Circle
Upper and Lower Sum or Riemann Sum
Triangles