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翰林數學_2下_CH3-4_扣條
Author:
翰林數學
GeoGebra
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判斷球體
【案例】圆柱体内放置一个大球六个小球
画直线等分三角形的面积
兩組對邊相等和有直角的四邊形
三位數除以一位數（一）
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等差數列2
ruler
正方體的旋轉對稱
圓錐截痕
四下_面積（一）(學生版)
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Quadrilaterals
Ellipse
Random Variables
Centroid or Barycenter
Trapezoid