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三棱锥三视图
Author:
冯伟冀
Topic:
Geometry
GeoGebra
New Resources
判斷球體
四邊形的特性
三位數除以一位數（二）
球体的体积推导（优化版）
兩組對邊相等和有直角的四邊形
Discover Resources
S2,3,5 Statistics
perimeter
垂線作圖
圆之吻（Apollonius circles）
三角函數 角度變換(個人認為直覺上較好理解的)(手機使用教材)
Discover Topics
Multiplication
Perimeter
Vectors 2D (Two-Dimensional)
Linear Programming or Linear Optimization
Incircle or Inscribed Circle