纵观近几年全国高中数学联赛和部分省市高中数学竞赛试题 ,圆锥曲线是命题的热点之一 ,而且比较接近高考 .在圆锥曲线中 ,焦半径、焦 (顶 )点弦长、焦 (顶 )点三角形面积等是非常重要的几何量 ,也是各类竞赛的重点 .为此 ,本讲主要介绍与这些几何量有关问题的求解策略 .一、基? Looking at the national high school mathematics league and some provincial and high school mathematics competitions in recent years, the conic curve is one of the hot spots of the proposition, and it is close to the college entrance examination. In the conic curve, the focal radius, focal (top) point chord length, coke ( Top) The triangle area is a very important geometric quantity, and it is also the focus of various competitions. For this reason, this presentation mainly introduces the solution strategies for the problems related to these geometric quantities.