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線性變換矩陣（二階）的副本
Author:
xiaodandan
,
arist
GeoGebra
New Resources
判斷球體
兩組對邊相等和有直角的四邊形
三位數除以一位數（一）
找出對稱軸
四邊形的特性
Discover Resources
花瓶
對數的遞增或遞減(底數大於1)
四邊形的簡介
電子幾何條的副本
Quiz on Addition and Subtraction of Directed Numbers (1)
Discover Topics
Numbers
Sphere
Optimization Problems
Pyramid
Rhombus