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Transit of Venus - Pentagram
Author:
Chenwei Chen
GeoGebra
New Resources
兩位數加法
拼砌四邊形
兩組對邊相等的四邊形
三位數除以一位數（一）
直角坐標平面上的旋轉變換
Discover Resources
中垂線性質
圓周率的應用 題A
三角形分類
橢圓2--四圓心近似法
线性相关系数
Discover Topics
Fractal Geometry
Optimization Problems
Natural Numbers
Quadratic Functions
Centroid or Barycenter