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三角四星
Author:
吳秉沂
GeoGebra
New Resources
四邉形 (四年級) 教師版
畫出對稱圖形
Fibonacci Clock
國旗 (Claude 版)
近似值：有效數字
Discover Resources
Right Triangles in a Circle 圓內的直角三角形
迭代出根號n螺旋線
椭圆内光线的反射
中位线问题
公平的切蛋糕 Selfridge-Conway 免嫉妒分法(envy-free cake-cutting)
Discover Topics
Secant Line or Secant
Hyperbola
Diagrams
Circumcircle or Circumscribed Circle
Parabola