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判別式
Author:
hsu hung yang
GeoGebra
New Resources
兩位數加法
【案例】2018年全国1卷理科12题
球体的体积推导
【案例】2013年安徽高考15题
四邊形的特性
Discover Resources
saaddfasdf
鉛筆的長度
錯角
一道三视图的题目（三视图作法参考）
小游戏
Discover Topics
Similar Triangles
Curve Sketching
Pie Chart or Circle Chart
Pythagoras or Pythagorean Theorem
Ellipse