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平行四邊形與三角形
Author:
李春培
Topic:
Area
平行四邊形與三角形
GeoGebra
New Resources
三位數除以一位數（一）
画直线等分三角形的面积
四邊形的特性
判斷球體
四邉形 (四年級) 教師版
Discover Resources
三角函數的疊合
regular tetrahedron (CH4)
作業
Geometric Solids: Recognize, Name and Sort
伍四红 圆与正方形 面积同周长比较
Discover Topics
Arithmetic Mean
Percentages
Similar Triangles
Upper and Lower Sum or Riemann Sum
Pie Chart or Circle Chart