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等腰三角形对称性
Author:
海平 文
Topic:
Triangles
GeoGebra
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活动三:应用性质
盈利與虧蝕
斐波那契螺旋弧线(表格法)
撒针估算面积实验
GeoGebra数学资源(4-8年级)
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向量分解
等值分數
gjh-h04-01 多個堆疊的直角三角形
青字歌
橢圓的副本
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Geometric Transformations
Perimeter
Algebra
Right Triangles
Cylinder