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橢圓的切線作圖
Author:
紀延平
GeoGebra
New Resources
画直线等分三角形的面积
兩位數加法
三位數除以一位數（二）
四邉形 (四年級) 教師版
【案例】2013年安徽高考15题
Discover Resources
七巧板貓咪2
Quiz on Addition and Subtraction of Directed Numbers (2) 有向數加減測驗(2)
四次函數
诱导公式六（90°-α）
圓錐截痕
Discover Topics
Piecewise Functions
Quadratic Functions
Linear Equations
Root
Integral Calculus