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四邊形四個西姆松圓交於九點心
Author:
連琨銘
GeoGebra
New Resources
找出對稱軸
畫出對稱圖形
兩位數除以一位數（二）
判斷球體
兩組對邊相等的四邊形
Discover Resources
方格紙上畫長方形2
Triangle Inequalities
If指令的應用1
圓周角與圓心角之度數關係臆測（圓心在圓周角的外部）
动圆与两圆外切与内切(1)
Discover Topics
Upper and Lower Sum or Riemann Sum
Hypergeometric Distribution
Constructions
Probability
Parametric Curves