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六上：圆的面积公式推导
Author:
钟秀群
Topic:
Circle
GeoGebra
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画直线等分三角形的面积
柱體建築師
兩組對邊相等的四邊形
兩位數加法
第八周作业
Discover Resources
選擇合適的「中間人」
y=x sin(1/x) 的圖形
多邊形周界A
Rectangle
同心六邊形
Discover Topics
Dilation
Translation
Plane Figures or Shapes
Constructions
Median Value