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zuiduan
Author:
luodeqin@keleshuxue.com
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兩位數加法
畫出對稱圖形
兩組對邊相等和有直角的四邊形
球體建築師
算柱 (兩位數)
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正多邊形滾動
直线与椭圆
旋轉體：Washer Method
vbvbvbvc
三角形的心
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Circumcircle or Circumscribed Circle
Median Line
Equilateral Triangles
Logarithmic Functions
Poisson Distribution