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椭圆里面光的汇聚
Author:
李大地(Field Lee)
GeoGebra
New Resources
球體建築師
找出對稱軸
兩組對邊相等和有直角的四邊形
【案例】圆柱体内放置一个大球六个小球
三位數除以一位數（一）
Discover Resources
Line Perpendicular to Plane 垂直於平面的直線
Exploring the changes in mean and median
多項式函數
三角形
分項對消式的寫法的副本
Discover Topics
Dilation
Rhombus
Tangent Line or Tangent
Quadratic Equations
Logic