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選擇合適的「中間人」
Author:
LAI KA MING
GeoGebra
New Resources
畫出對稱圖形
拼砌四邊形
判斷球體
四邉形 (四年級) 教師版
【案例】圆柱体内放置一个大球六个小球
Discover Resources
立體圖
終點軌跡
The Beautiful Dance of the Earth and Venus
歐幾米德多面體（四邊形與六邊形－進階加強版）
二次函数y=a(x-h)^2+k各参数性质
Discover Topics
Pythagoras or Pythagorean Theorem
Area
Equilateral Triangles
Function Graph
Geometric Mean