《解直角三角形》和《二次函数》是中考命题中重点考查的内容,在2005年省实验区的考试题中占到近16.47%的分值.希望同学们在一开始学习时就对其基本内容有一个很好的了解,只有这样才能在知识的理解、应用过程中得心应手.下面我们对这两部分内容作一些概述.一、直角三角形的边角 “Solve Triangle” and “Quadric Function” are the key examination items in the examination proposition, which accounted for nearly 16.47% of the scores in the examination area of ​​the Provincial Experimental Area in 2005. I hope that the students will learn about it at the beginning of their studies. The basic content has a good understanding. Only in this way can the knowledge be understood and applied in the process of application. Here we outline some of the contents of the two parts. First, the corners of the right triangle