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梯形面积2
Author:
杨华
GeoGebra
New Resources
三位數除以一位數（二）
四邉形 (四年級) 教師版
拼砌四邊形
四邊形的特性
画直线等分三角形的面积
Discover Resources
GGB研習作品
奈格爾點
放缩尺
廣義角
Quiz on Addition and Subtraction of Directed Numbers (2)
Discover Topics
Unit Circle
Exponential Functions
Straight Lines
Scatter Plot
Root