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凸透鏡的成像（理想）
Author:
joeyliaw.tw
GeoGebra
New Resources
兩位數除以一位數（一）
畫出對稱圖形
【案例】2018年全国1卷理科12题
GeoGebra笔记功能体验课件
兩位數加法
Discover Resources
平行四邊形
Reference Angle 參考角
周界(移邊)
雪花的碎形規律
中国节灯笼
Discover Topics
Upper and Lower Sum or Riemann Sum
Quadratic Functions
Logarithm
Right Triangles
Centroid or Barycenter