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凸透鏡的成像（理想）
Author:
joeyliaw.tw
GeoGebra
New Resources
sanjiaohanshu
畫出對稱圖形
GeoGebra笔记功能体验课件
第八周作业
【案例】2013年安徽高考15题
Discover Resources
sine graph (reduce to 1/2 and then translate leftward by 15 degree)
正三角形
F-10-2-poly3-gph-bac-1
Travelling Waves
算幾不等式
Discover Topics
Step Functions
Centroid or Barycenter
Parabola
Special Points
Linear Equations