题1如图1,矩形ABCD中,八刀一a,且二 一b,M是BC的中点,DE土AM,E是垂足. 之B 召M =900,A刀 求证二DE-一兰巫址一 了4了干石丁‘ 证法1巧用面积公式 连结DM,则 S矩形~一25△~. 在矩形月刀CD中, “目” Blee,怨se.JC 、J刃 关少 l请下载后查看，本文暂不支持在线获取查看简介。 ~.:犷上又.洲- 乙 -a, b 2’ 所以、韶az+(t)’一 Question 1 is shown in Figure 1. In the rectangular ABCD, eight knives are one a, and two ones are b, M is the midpoint of BC, DE earth AM, E is the vertical foot. The B summons M = 900, A knife proves two DE- At the site of the Mausoleum, there are four dry stone dices. ’Symbol 1’ uses the area formula to link DM’s, then the S rectangle’ is a 25 △~. In the rectangular moon knife CD, ’Head’ Blee, Zuan se.JC, and J’ blade clearance Less l Please download and view, this article does not support online access to view profile. ~.: 犷上又.洲-乙 -a, b 2’ So, 韶az+(t)’