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congruent (AAA)
Author:
Ricky Chan
GeoGebra
New Resources
畫出對稱圖形
GeoGebra笔记功能体验课件
拼砌四邊形
直角坐標平面上的旋轉變換
兩位數除以一位數（二）
Discover Resources
平行四邊形有甚麼特性？
圓&五邊形
SIN伸縮平移
moon
第一个绘本
Discover Topics
Geometric Mean
Quadratic Equations
Ellipse
Difference and Slope
Tree Diagrams