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congruent (SA) 2
Author:
Ricky Chan
GeoGebra
New Resources
判斷球體
拼砌四邊形
兩位數除以一位數（一）
兩組對邊相等的四邊形
兩位數除以一位數（二）
Discover Resources
動畫
三角形内角和演示
蝴蝶定理推廣證明2(交比)
等腰直角三角形
保持2:3:4
Discover Topics
Vectors 3D (Three-Dimensional)
Exponent
Numbers
Quadratic Equations
Prism