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三角形外心
Author:
Chang Hui Fang
GeoGebra
New Resources
找出對稱軸
三位數除以一位數（一）
近似值：有效數字
兩位數除以一位數（二）
球體建築師
Discover Resources
鏡射再旋轉
構造切線 / construct the tangent line
相似三角形
Locus (Two points 2)
斜率是定值
Discover Topics
Addition
Mathematics
Symmetry
Statistical Characteristics
Triangles