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Author:
袁智强
GeoGebra
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比較五件物件的重量
GeoGebra数学资源(4-8年级)
撒针估算面积实验
平行線的判定
第三周作业效果演示
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鏡射
Right Triangles in a Circle 圓內的直角三角形
移動滑桿k 控制k1 k2 k3數值變化
內心
三次多項式的切線
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