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开关灯1
Author:
赵林
GeoGebra
New Resources
直角坐標平面上的旋轉變換
三位數除以一位數（二）
判斷球體
畫出對稱圖形
球體建築師
Discover Resources
方格紙上畫平行四邊形1
例子
congruent (SSS) 2
Locus (Parallel lines)
密铺图形
Discover Topics
Scatter Plot
Functions
Optimization Problems
Matrices
Dilation