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过一直线与已知直线相交
Author:
孟宝兴
GeoGebra
New Resources
錐體建築師
兩組對邊相等的四邊形
畫出對稱圖形
三位數除以一位數（二）
兩組對邊相等和有直角的四邊形
Discover Resources
公弦
優良作品1(孟倫)
If x^2 + x + k > 0 for any real value of x, what is k?
Protractor-usage
【初中】动点问题
Discover Topics
Differential Equation
Inequalities
Linear Programming or Linear Optimization
Line Segment
Reflection