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Author:陳兪宏

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畫出對稱圖形
【案例】2018年全国1卷理科12题
球體建築師
三位數除以一位數（一）
近似值：有效數字

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已知橢圓 x^2/a^2+y^2/b^2=1 (a>b>0)
正多面體
Congruent and Similarity
地球儀
S3_Ch4.3_立體圖形的三視圖(3D圖)

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Cosine
Line Segment
Incircle or Inscribed Circle
Quadrilaterals
Surface

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