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sharon扭曲的正方形
Author:
杨秀芬
GeoGebra
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美國國旗 (Codex 版)
長方體平面投影 (Codex版)
兩組對邊相等和有直角的四邊形
找出對稱軸
四邉形 (四年級) 教師版
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方格紙上畫平行四邊形2
四邊形
均分除法（整數÷整數）
testing
林辰洋 ggb作業2
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Cone
Kite
Functions
Arithmetic Operations
Prism