所谓焦点三角形,指的是椭圆或双曲线上任一点与两焦点连结而成的三角形.椭圆与双曲线的焦点三角形,是高考考查椭圆、双曲线的定义、几何性质,解三角形的重要素材.本文主要介绍椭圆与双曲线的焦点三角形的一对对偶等式,其结构对称,形式美观, The so-called focus triangle, refers to the oval or hyperbolic point of any point connected with the two triangles.Ellipse and hyperbolic focus triangle, the college entrance examination examines the definition of elliptic, hyperbolic, geometric properties, an important material to solve the triangle.This paper This paper mainly introduces a pair of dual equations of the focal triangle of ellipse and hyperbola, whose structure is symmetrical, beautiful in form,