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六上：圆的面积公式推导
Author:
钟秀群
Topic:
Circle
GeoGebra
New Resources
錐體建築師
四邉形 (四年級) 教師版
兩位數加法
算柱 (兩位數)
直角坐標平面上的旋轉變換
Discover Resources
平行四邊形與三角形
gjh-b03-01 圓與直線關係
p10-4
三角柱
折正三角形
Discover Topics
Logarithmic Functions
Mathematics
Special Points
Unit Circle
Intersection