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Author:陳兪宏

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判斷球體
【案例】2018年全国1卷理科12题
兩組對邊相等的四邊形
球体的体积推导
畫出對稱圖形

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柯西不等式
三角形外心的角度關係
圆锥曲线的第二定义的副本
冰淇淋
圆的面积展开的副本

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Polygons
Tangent Line or Tangent
Isosceles Triangles
Reflection
Cuboid

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