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Euler line 2
Author:
uccke
GeoGebra
New Resources
【案例】2018年全国1卷理科12题
兩組對邊相等和有直角的四邊形
第八周作业
三位數除以一位數（一）
画直线等分三角形的面积
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線之極點定理 / pole of a line theorem
推移畢氏
國旗
比例中的定值問題(一)
勾股定理：射影无字证明
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Geometry
Means
Variance
Perimeter
Linear Equations