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毕氏螺线
Author:
林峰
GeoGebra
New Resources
球體建築師
四邊形的特性
兩位數除以一位數（二）
【案例】2013年安徽高考15题
兩組對邊相等和有直角的四邊形
Discover Resources
方格紙上畫正方形2
Triangle
Meaning of Negative Indices 負指數的意義
ETV 對稱
算法复杂度函数
Discover Topics
Solids or 3D Shapes
Plane Figures or Shapes
Bar Chart or Bar Graph
Equilateral Triangles
Median Line