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proof30黃煒皓
Author:
郭亮偉
GeoGebra
New Resources
錐體建築師
球体的体积推导（优化版）
畫出對稱圖形
球体的体积推导
四邊形的特性
Discover Resources
旋轉動畫
正方形轉轉
test
congruent (AAA) 2
必修二P156二面角与平面的法向量
Discover Topics
Correlation
Angles
Median Line
Standard Deviation
Centroid or Barycenter