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图形的位似
Author:
备课小刘
GeoGebra
New Resources
美國國旗 (Codex 版)
近似值：有效數字
拼砌四邊形
畫出對稱圖形
Earth with coastline
Discover Resources
CK雋翔的GGB BOOK
軌跡七︰移動點與一點一線保持相等距離(拋物線)
triangle
Example 2
門格海綿
Discover Topics
Triangles
Equilateral Triangles
Logic
Symmetry
Functions