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三節棍問題
Author:
min
GeoGebra
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【案例】2013年安徽高考15题
找出對稱軸
【案例】2018年全国1卷理科12题
畫出對稱圖形
兩位數加法
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随机分支长度的二分树
三角測量01
Quiz on Solving Quadratic Inequalities 解二次不等式：測驗 (v2018)
七巧板的副本
网易
Discover Topics
Kite
Quadrilaterals
Algebra
Expected Value
Piecewise Functions