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quadrilaterals 6
Author:
iedc
GeoGebra
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平行線的判定
GeoGebra数学资源(4-8年级)
第三周作业效果演示
斐波那契螺旋弧线(表格法-可动态调节)
第八周作业3
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proof10 曹詠鈞
長方形面積
太陽系的認識(問答)
P4構作對稱圖形
cos, sin 與單位圓的副本
Discover Topics
LCM and GCD
Conic Sections
General Quadrilateral
Centroid or Barycenter
Constructions