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正4正8黏合
Author:
Wu Xiao-Ren
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
兩位數加法
四邊形的特性
找出對稱軸
兩位數除以一位數（二）
Discover Resources
兩數相加
平面幾何
Activity 1
不规则图形平移
圆的面积展开的副本
Discover Topics
Integers
Frequency Distribution
Vectors
Perimeter
Dilation