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外心的位置
Author:
謝定原
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
兩組對邊相等的四邊形
画直线等分三角形的面积
兩位數除以一位數（二）
判斷球體
Discover Resources
有趣的切圓
四邊形四個西姆松圓交於九點心
Angle between Lateral Faces 1
congruent triangle2_provided by Mr Yeung Kar Chun
一忠 25 李恩豪 平行線
Discover Topics
Algebra
Bar Chart or Bar Graph
Stochastic Process or Random Process
Similarity Transformation or Similarity
Histogram