初看2015年重庆中考数学第25题,我们的普遍感觉是:第(3)小题图形复杂,证明困难.那么,如何将此图形变得简单呢?证明的关键在哪里呢?本文尝试研究这个问题.一、试题解答赏析题目如图1,在△ABC中,∠ACB=90°,∠BAC=60°,点E是∠BAC角平分线上一点,过点E作AE的垂线,过点A作AB的垂线,两垂线交于点D,连结DB,点F是BD的中 First look at the 2015 Chongqing entrance exam math 25 questions, our general feeling is: (3) Quiz complex graphics to prove difficult.Then, how to make this graphic easier? The proof of the key where? This article attempts to study In the ABC, ∠ACB = 90 °, ∠BAC = 60 °, point E is 平BAC angle bisector point, point E for the AE of the vertical line, A point AB for the vertical, two perpendicular to the point D, the link DB, F is the BD