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欢度春节（灯笼）
Author:
zgc112
GeoGebra
New Resources
直角坐標平面上的旋轉變換
拼砌四邊形
畫出對稱圖形
算柱 (兩位數)
長方體平面投影 (Codex版)
Discover Resources
Pythagorean Theorem Proof: Shearing
ghseh 二次函數描點法上下平移-1
拋物線相似
椭圆的定义
勾股定理的证明
Discover Topics
Hypergeometric Distribution
Matrices
Scalene Triangles
Constructions
Geometric Mean