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2-1-2-a
Author:
Joye Wang
GeoGebra
New Resources
平行線的判定
常见四边形是否是双心四边形
科氏力 (Coriolis Force)
斐波那契螺旋弧线（表格法-可动态调节）
圓的基本性質
Discover Resources
圖一
a slope triangle
王宏銘Proof93
追击问题
z20联盟数学考试第七题
Discover Topics
Polygons
Congruence
Tangent Function
Upper and Lower Sum or Riemann Sum
Rhombus