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Anticlockwise Rotation (2,3)
Author:
amn
GeoGebra
New Resources
算柱 (兩位數)
拼砌四邊形
兩組對邊相等和有直角的四邊形
長方體平面投影 (Codex版)
四邉形 (四年級) 教師版
Discover Resources
異分母的分數加減
Copy of 周界
角谷猜想
最短路径
元旦快乐（制作：孟宝兴）
Discover Topics
Geometric Mean
Equilateral Triangles
Differential Equation
Optimization Problems
Indefinite Integral