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Author:
杨桃李@
GeoGebra
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探究三角形的全等條件
漂亮的摇摆曲线
双心四边形
圓的切線方程
【案例】2018年全国1卷理科12题
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task6
旋轉一物件02
分數(二)
任何三角形內角和180度(五上數翰４－２)
最短路径
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Means
Algebra
Trapezoid
Rhombus
Circumcircle or Circumscribed Circle