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正方形纸片剪出正三角形(顶点在边上)
Author:
孟宝兴
正方形纸片剪出正三角形(顶点在边上)
GeoGebra
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斐波那契螺旋弧线(表格法-可动态调节)
GeoGebra数学资源(4-8年级)
正方形雪花图案
镂空正方体案例对比
龙形曲线-分形龙2
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乘法口诀
quiz 9.1 2(d)
正弦余弦刻度尺
堆叠方块
黃金矩形
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Linear Functions
Conditional Probability
Translation
Dilation
Orthocenter