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餘弦函數值的變化
Author:
t0759
GeoGebra
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異分母分數減法
兩組對邊相等和有直角的四邊形
畫出對稱圖形
三位數除以一位數（一）
錐體建築師
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正立方體展開動畫
Symmetric設計對稱圖案(兩條對稱軸)(斜)
畫三角形 題3d
數位學習社103 12 15
百分數應用題：比較兩數大小
Discover Topics
Root
Conic Sections
Sequences and Series
Mathematics
Cosine