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Waves
Author:
袁智强
GeoGebra
New Resources
折扣
圓的切線方程
龙形曲线-分形龙
第八周作业2
活动三：应用性质
Discover Resources
解方程式
parallelogram
中一︰相似圖形（平移、旋轉、反射、放大縮小）
正方形分割
Copy of 製作組織圖
Discover Topics
Centroid or Barycenter
Sequences and Series
Vectors
Ellipse
Optimization Problems