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國八：乘法公式與多項式-多項式係數之和
Author:
賴尚欣
GeoGebra
New Resources
画直线等分三角形的面积
【案例】圆柱体内放置一个大球六个小球
拼砌四邊形
畫出對稱圖形
四邉形 (四年級) 教師版
Discover Resources
quadrilaterals 5
test
千年曆
七巧板（tangram）的副本
線的面化
Discover Topics
Isosceles Triangles
Scatter Plot
Random Experiments
Mode
Set Theory