欧拉线
在平面几何中，欧拉线，因翻译问题而又称欧拉线（图中的红线）是指过三角形的垂心（蓝）、外心（绿）、重心（黄）和九点圆圆心（红点）的一条直线。莱昂哈德·欧拉也称欧拉证明了在任意三角形中，以上四点共线。欧拉线上的四点中，九点圆圆心到垂心和外心的距离相等，而且重心到外心的距离是重心到垂心距离的一半。注意内心一般不在欧拉在线，除了等腰三角形外。
Euler line
中文百科
英语百科
Euler line 欧拉线
In geometry, the Euler line, named after Leonhard Euler (/ˈɔɪlər/), is a line determined from any triangle that is not equilateral. It is a central line of the triangle, and it passes through several important points determined from the triangle, including the orthocenter, the circumcenter, the centroid, the Exeter point and the center of the nine-point circle of the triangle.
- Second degree burn of wrist的意思
- Second degree burn of wrist and hand的意思
- second degree burns的意思
- second degree curve的意思
- Second degree equation的意思
- second degree erythematous dose的意思
- second degree exit block的意思
- second degree heart block的意思
- second degree hurn的意思
- second degree hyperparasite的意思
- second degree Kaschin Beck disease的意思
- Second degree murder的意思
- second degree of relationship的意思
- second degree parabola的意思
- Second degree perineal laceration的意思
- second degree relative的意思
- second degree relatives的意思
- second degree retrograde ventricular atrial block的意思
- second degree skin burn的意思
- second degree sprain的意思
- second degree statistics的意思
- second degree surface的意思
- Second degree uterine prolapse的意思
- second delay electric detonator的意思
- second deliverance的意思