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贪吃蛇（第一版）
Author:
孟宝兴
GeoGebra
New Resources
拼砌四邊形
直角坐標平面上的旋轉變換
兩組對邊相等和有直角的四邊形
判斷球體
兩組對邊相等的四邊形
Discover Resources
平行四邊形之變奏I
Circle Properties
线段的最值
資料統計
gjc090b13 二次函數的平移
Discover Topics
Subtraction
Means
Rhombus
Median Line
Centroid or Barycenter