The First Brocard Point

Construct a circle through vertices A and B, tangent to side BC of the triangle. Symmetrically, construct the other two circles. These three circles intersect at the first [b]Brocard Point[/b] of triangle ABC. Cevians through the Brocard point make symmetrically equal angles with the sides of the triangle. The three circles just constructed are also designated as [b]epicycles of triangle ABC[/b]. The second Brocard point is constructed in similar fashion, and is the isogonal conjugate of the first Brocard point.

 

Steve Phelps

 
资源类型
活动
标签
geometry  modern  triangle 
目标群组(年龄)
14 – 18
语言
English
 
 
 
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