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圖形周界_H
Author:
lkkbmaths teachers 檔案儲存用
GeoGebra
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畫出對稱圖形
四邉形 (四年級) 教師版
拼砌四邊形
三位數除以一位數（一）
球體建築師
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龍騰4_1-1習6-2
正二十面體內接黃金矩形
QQ空间
椭圆的一种简单画法.许兴华数学
S3 Ex4.3 Q06(3D圖)
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Parallelogram
Matrices
Line Segment
Subtraction
Arithmetic Operations