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ex 5
Author:
LAM YU SANG
GeoGebra
New Resources
拼砌四邊形
直角坐標平面上的旋轉變換
三位數除以一位數（一）
畫出對稱圖形
第八周作业
Discover Resources
兩線段和圓3
test01
畫三角形 第1題
固定周界的長方形的面積變化（周界是200厘米）
Illusion-若隐若现的白点
Discover Topics
General Quadrilateral
Random Experiments
Centroid or Barycenter
Pythagoras or Pythagorean Theorem
Distributions