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过一直线与已知直线相交
Author:
孟宝兴
GeoGebra
New Resources
兩組對邊相等的四邊形
兩組對邊相等和有直角的四邊形
兩位數加法
第八周作业
拼砌四邊形
Discover Resources
圍棋名人賽
task1
cubes
四次函數圖形
完全图及其变形
Discover Topics
Geometric Transformations
Intersection
Conic Sections
Division
Difference and Slope