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Author:
羅驥韡 (Pegasus Roe)
GeoGebra
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四邉形 (四年級) 教師版
画直线等分三角形的面积
判斷球體
球体的体积推导（优化版）
畫出對稱圖形
Discover Resources
七巧板揖人2
Concept of Ratios 比的概念
Rounding Quiz (Combined) 小數位及有效數字：同步測驗
Question 8
XY 圖線段長度計算
Discover Topics
Incircle or Inscribed Circle
Integers
Probability
Definite Integral
Geometric Transformations