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Apollonius Problem 7 CCP Inversion simple
Author:
tkyggb
GeoGebra
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柱體建築師
算柱 (兩位數)
錐體建築師
兩組對邊相等和有直角的四邊形
兩位數除以一位數（一）
Discover Resources
題 4
十字轉換成2正方形
Rectangle Prism
華容道Klotski Puzzle-一橫四豎(三國版)
用GGB做遊戲 Math Games By GGB
Discover Topics
Polygons
Orthocenter
Complex Numbers
Cosine
Congruence