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時鐘
Author:
戴宇宏
GeoGebra
New Resources
画直线等分三角形的面积
拼砌四邊形
球体的体积推导
異分母分數減法
兩位數加法
Discover Resources
七巧板揖人
旋轉動畫
Congruent Triangles Demo
多重刻度磅
Copy of Factorization of Quadratic Polynomials (Table Method) 因式分解一元二次多項式（表格法）
Discover Topics
Linear Functions
Arithmetic Operations
Unit Circle
Normal Distribution
Volume