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P5探究：垂线段最短
Author:
陈力
Topic:
Geometry
GeoGebra
New Resources
兩位數除以一位數（二）
找出對稱軸
畫出對稱圖形
錐體建築師
球体的体积推导（优化版）
Discover Resources
真分數相乘
二元一次不等式-約東條件下的極大值極小值
三角形重心
Rectangle
拼出三角形
Discover Topics
Complex Numbers
Scatter Plot
Ellipse
Tangent Line or Tangent
Angles