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橢圓的定義（by Jutor）
Author:
JutorMath
GeoGebra
New Resources
sanjiaohanshu
畫出對稱圖形
【案例】2018年全国1卷理科12题
異分母分數減法
判斷球體
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找出活動所用的時間
regular hexagon construction
任兩正方形重組成一大正方形partII
最小周長
棒形圖2
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Area
Power Functions
Dilation
Ellipse
Rotation