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Author:
lu xinsheng
GeoGebra
New Resources
三位數除以一位數（二）
讀磅
直線的斜率
兩位數除以一位數（二）
圓的切線方程
Discover Resources
已知橢圓 x^2/a^2+y^2/b^2=1 (a>b>0)
證明三角形內角和180度
arithmetic operation
國旗上傳測試
模拟时钟
Discover Topics
Angles
Pyramid
Piecewise Functions
Conic Sections
Linear Programming or Linear Optimization