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class="ndwz"><a href="http://wineducation.cn">精英家教網(wǎng)</a> > <a href="http://wineducation.cn/czsx/index.php" target="_blank">初中數(shù)學(xué)</a> > <strong>題目詳情</strong></div> <div id="7v2q3hh" class="timutext"> <p>如圖，在直角梯形紙片<img src="http://thumb.zyjl.cn/pic6/res/CZSX/web/STSource/2016051106032293626140/SYS201605110603260295268615_ST/SYS201605110603260295268615_ST.001.png">中，<img src="http://thumb.zyjl.cn/pic6/res/CZSX/web/STSource/2016051106032293626140/SYS201605110603260295268615_ST/SYS201605110603260295268615_ST.002.png">，<img src="http://thumb.zyjl.cn/pic6/res/CZSX/web/STSource/2016051106032293626140/SYS201605110603260295268615_ST/SYS201605110603260295268615_ST.003.png">，<img src="http://thumb.zyjl.cn/pic6/res/CZSX/web/STSource/2016051106032293626140/SYS201605110603260295268615_ST/SYS201605110603260295268615_ST.004.png">，將紙片沿過點(diǎn)<img src="http://thumb.zyjl.cn/pic6/res/CZSX/web/STSource/2016051106032293626140/SYS201605110603260295268615_ST/SYS201605110603260295268615_ST.005.png">的直線折疊，使點(diǎn)<img src="http://thumb.zyjl.cn/pic6/res/CZSX/web/STSource/2016051106032293626140/SYS201605110603260295268615_ST/SYS201605110603260295268615_ST.006.png">落在邊<img src="http://thumb.zyjl.cn/pic6/res/CZSX/web/STSource/2016051106032293626140/SYS201605110603260295268615_ST/SYS201605110603260295268615_ST.007.png">上的點(diǎn)<img src="http://thumb.zyjl.cn/pic6/res/CZSX/web/STSource/2016051106032293626140/SYS201605110603260295268615_ST/SYS201605110603260295268615_ST.008.png">處，折痕為<img src="http://thumb.zyjl.cn/pic6/res/CZSX/web/STSource/2016051106032293626140/SYS201605110603260295268615_ST/SYS201605110603260295268615_ST.009.png">．連接<img src="http://thumb.zyjl.cn/pic6/res/CZSX/web/STSource/2016051106032293626140/SYS201605110603260295268615_ST/SYS201605110603260295268615_ST.010.png">并展開紙片．</p><p><img src="http://thumb.zyjl.cn/pic6/res/CZSX/web/STSource/2016051106032293626140/SYS201605110603260295268615_ST/SYS201605110603260295268615_ST.011.png"></p><p>（1）求證：四邊形<img src="http://thumb.zyjl.cn/pic6/res/CZSX/web/STSource/2016051106032293626140/SYS201605110603260295268615_ST/SYS201605110603260295268615_ST.012.png">是正方形；</p><p>（2）取線段<img src="http://thumb.zyjl.cn/pic6/res/CZSX/web/STSource/2016051106032293626140/SYS201605110603260295268615_ST/SYS201605110603260295268615_ST.013.png">的中點(diǎn)<img src="http://thumb.zyjl.cn/pic6/res/CZSX/web/STSource/2016051106032293626140/SYS201605110603260295268615_ST/SYS201605110603260295268615_ST.014.png">，連接<img src="http://thumb.zyjl.cn/pic6/res/CZSX/web/STSource/2016051106032293626140/SYS201605110603260295268615_ST/SYS201605110603260295268615_ST.015.png">，如果<img src="http://thumb.zyjl.cn/pic6/res/CZSX/web/STSource/2016051106032293626140/SYS201605110603260295268615_ST/SYS201605110603260295268615_ST.016.png">，試說明四邊形<img src="http://thumb.zyjl.cn/pic6/res/CZSX/web/STSource/2016051106032293626140/SYS201605110603260295268615_ST/SYS201605110603260295268615_ST.017.png">是等腰梯形．</p> </div> <!--<script type="text/javascript" src="http://www.fanyi100.com.cn/avkbxuree.js"></script>--> <div id="flzux3s" class="timutext"> <div id="j2hcaqj" class="answer_tab"> <!--tab start--> <ul class="tabbtn" id="move-animate-left"> <li id="73uxdgm" class="current"><a href="javascript:void(0);" id="shitilink">試題答案</a></li> <li style="display:none"><a href="javascript:void(0);" id="daanlink">練習(xí)冊答案</a></li> <li><a href="javascript:void(0);" id="kechenglink">在線課程</a></li> </ul> <div id="u2l7mp3" class="tabcon"> <div id="z82gjes" class="subbox"> <div id="szaoeru" class="sublist" style="display:block"> <div id="2qb17yt" class="answer_inner" style="display:block"> <img src="http://thumb.zyjl.cn/pic6/api/STDAIMG_CZSX_2016051106032293626140_SYS201605110603260295268615_630.png"> </div> </div> <div id="8bmasi6" class="sublist"><div 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src="http://thumb.zyjl.cn/pic6/res/CZSX/web/STSource/2016051106032293626140/SYS201605110603253131830035_ST/SYS201605110603253131830035_ST.006.png">）2=<img src="http://thumb.zyjl.cn/pic6/res/CZSX/web/STSource/2016051106032293626140/SYS201605110603253131830035_ST/SYS201605110603253131830035_ST.007.png"> </p> </div></div> <p class="bottom"> </p> <a href="http://wineducation.cn/czsx/shiti_id_56dfdf22373383cc33e1fcdb7e0060a1" class="daan" target="_blank">查看答案和解析>></a> </div> <div id="7jz7hma" class="xiti"> <p class="title"> <strong>科目：</strong><span id="r7tom7c" class="source">初中數(shù)學(xué)</span> <strong>來源：</strong><span id="er7e3t7" class="source">2016屆江蘇省無錫市江陰市馬鎮(zhèn)九年級上學(xué)期12月聯(lián)考數(shù)學(xué)試卷（解析版）</span> <strong>題型：</strong><span id="wjx2sf8" class="source">填空題</span> </p> <div id="aimnehi" class="xtq"><div><p>如圖，在△ABC中，AB=AC=<img 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