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可拖动A、B 改变形状
Author:
孟宝兴
GeoGebra
New Resources
長方體平面投影 (Codex版)
美國國旗 (Codex 版)
直角坐標平面上的旋轉變換
兩組對邊相等的四邊形
拼砌四邊形
Discover Resources
RECTANGLE
ex 8
Copy of 畢氏樹
Copy of 閱讀鐘面及數字鐘（時和分）
图形的放大与缩小.许兴华数学
Discover Topics
Poisson Distribution
Kite
Integral Calculus
Tangent Line or Tangent
Geometric Transformations