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平行的角度
Author:
周桂名
兩平線的角度關係! 看不出來,移動M點試試!
GeoGebra
New Resources
球体的体积推导(优化版)
兩位數加法
四邊形的特性
兩組對邊相等的四邊形
畫出對稱圖形
Discover Resources
數學4其他圖
Triangle 02
Prism and Cylinder 4
straight line
拼出三角形的副本
Discover Topics
Boxplot
Fractions
Dilation
Triangles
Sequences and Series