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椭圆定义
Author:
代红军
GeoGebra
New Resources
【案例】圆柱体内放置一个大球六个小球
三位數除以一位數（二）
空间中两直线的位置关系
多邊形的面積
兩位數加法
Discover Resources
作業3-1 增加互動功能
甚麼是球體
Congruent and Similarity
地球儀
正角、負角|Positive angles & Negative angles
Discover Topics
Matrices
Bar Chart or Bar Graph
Symmetry
Secant Line or Secant
Linear Programming or Linear Optimization