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國旗

Author:張瑋哲

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近似值：有效數字
兩組對邊相等的四邊形
四邊形的特性
兩位數加法
四邉形 (四年級) 教師版

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判斷柱體10
旋轉一物件02
同心六邊形
Cross Product for 2D Vectors (平面外積)
一筆畫圖形

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Statistics
Definite Integral
Trigonometry
Geometry
Sphere

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