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線性變換矩陣（二階）的副本
Author:
xiaodandan
,
arist
GeoGebra
New Resources
拼砌四邊形
Nested spiral octagon
兩組對邊相等的四邊形
Fibonacci Clock
兩組對邊相等和有直角的四邊形
Discover Resources
掃描不等式圖
數位學習社
兩圓的位置關係 ver.1
勝者即正義，可愛即正義～(可用Ctrl+滑鼠滾輪放大界面)
翰林數學_2下_CH3-2_SAS作圖
Discover Topics
Linear Functions
Distributions
Ratios
Parametric Curves
Algebra