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勒洛四面体（参数曲面法）
Author:
孟宝兴
GeoGebra
New Resources
長方體平面投影 (Codex版)
Nested spiral octagon
直角坐標平面上的旋轉變換
拼砌四邊形
兩組對邊相等和有直角的四邊形
Discover Resources
風車
Platonic Solids 柏拉圖立體
證平行四邊形 (對角線互相平分) (對邊 // 且相等)
周界-平移法(練習四)
Copy of sin(x) 的函數圖形
Discover Topics
Angles
Exponential Functions
Variance
Set Theory
Isosceles Triangles