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題4

Author:Anthony OR 柯志明

Topic:Congruence, Triangles

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兩組對邊相等的四邊形
画直线等分三角形的面积
【案例】圆柱体内放置一个大球六个小球
兩位數加法
四邉形 (四年級) 教師版

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畢氏定理
Similar triangles in a triangle
四角柱體（長方體）的截面
三角形的分割與組合(1)的副本
「相似三角形」任务4的副本

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Surface
Vectors 3D (Three-Dimensional)
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