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試證明:A=B+C
Author:
顏士勛
GeoGebra
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兩組對邊相等和有直角的四邊形
三位數除以一位數(二)
四邉形 (四年級) 教師版
球体的体积推导
柱體建築師
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矩形
捷徑問題
hihihi
Copy of 畫三角形 題1a
拼出三角形的副本
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Solids or 3D Shapes
Cube
Combinatorics
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