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兩圓內外公切線
Author:
AlexWang
GeoGebra
New Resources
拼砌四邊形
画直线等分三角形的面积
【案例】2018年全国1卷理科12题
兩位數除以一位數（二）
兩位數加法
Discover Resources
凸透鏡成像
了解為何 d(lnx)/dx = 1/x
整數的加法
複變數函數
Space-filling curve
Discover Topics
Scalene Triangles
Isosceles Triangles
Multiplication
Percentages
Derivative