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dynamics dragon
Author:
赵林
GeoGebra
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【案例】2018年全国1卷理科12题
找出對稱軸
兩組對邊相等的四邊形
兩位數除以一位數（二）
柱體建築師
Discover Resources
小學數學科 HTML5 Applets
Addition / Subtraction of 3 Directed Numbers
直線交點
整數除真分數
利用頂點描述二次函數 的複本
Discover Topics
Congruence
Poisson Distribution
Incircle or Inscribed Circle
Square
Difference and Slope