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正四面體
Author:
明欣
正四面體
GeoGebra
New Resources
球体的体积推导（优化版）
球體建築師
画直线等分三角形的面积
找出對稱軸
兩組對邊相等的四邊形
Discover Resources
檢驗區
Lagrange
UpdateConstruction
Copy of 固定面積的圖形的周界變化
蝴蝶定理动态演示
Discover Topics
Equilateral Triangles
Hypergeometric Distribution
Line Segment
Triangles
Real Numbers