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觀察軌跡
Author:
陳政任
觀察軌跡
GeoGebra
New Resources
探究三角形的全等條件
垂直線的斜率
圓的基本性質
球体的体积推导（优化版）
【案例】圆柱体内放置一个大球六个小球
Discover Resources
未完成的版本
王宏銘Proof93
直角三角形與正三角形
reflectional symmetry_5
动点
Discover Topics
Centroid or Barycenter
Conditional Probability
Secant Line or Secant
Rhombus
Optimization Problems