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平行四邊形
Author:
李春培
Topic:
Parallelogram
GeoGebra
New Resources
兩位數除以一位數（二）
四邊形的特性
第八周作业
画直线等分三角形的面积
判斷球體
Discover Resources
Polygon incised
兩條數線比較
空間中的平面
分數乘法3
Geometry : Types of Angles (幾何：角的種類)
Discover Topics
Rectangle
Real Numbers
Special Points
Quadratic Functions
Polygons