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重複
Author:
詠甯
GeoGebra
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錐體建築師
兩組對邊相等的四邊形
兩位數加法
兩組對邊相等和有直角的四邊形
兩位數除以一位數（二）
Discover Resources
各立體展開圖
Locus: Fixed Distance From Fixed Point
group m
算幾不等式
四年級 最大公因數
Discover Topics
Geometric Transformations
Correlation
Quadratic Equations
Arithmetic
Rectangle