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Author:
陳禹妗
GeoGebra
New Resources
圓的基本性質
垂直線的斜率
直線的斜率：水平變化 & 鉛垂變化
双心四边形
常见四边形是否是双心四边形
Discover Resources
Torus
圓錐體內切球
正方體的旋轉對稱
Chords of a Circle
美麗的花
Discover Topics
Optimization Problems
Triangles
Binomial Distribution
Calculus
Upper and Lower Sum or Riemann Sum