来自丁丁的问题
在三角形ABC中,∠C=90°,BD平分∠ABC,交AC于D.若DC=3,求点D到AB的距离.
在三角形ABC中,∠C=90°,BD平分∠ABC,交AC于D.若DC=3,求点D到AB的距离.
1回答
2020-07-27 20:48
我要回答
请先登录
孙汝忠
3因为角平分线上任意一点到角两边的距离相等
也可以用全等来证明
做点D到AB的垂线交AB与点F
因为∠C=∠F=90°DB=DB∠DBC=∠CBD
所以三角形DCB全等三角形DFB
得DC=DF=3
2020-07-27 20:49:42
最新问答
推荐文章
猜你喜欢
附近的人在看
推荐阅读
拓展阅读
- 【MyFavouriteFestival要求：1,点题2,写明人们怎么庆祝,你如何做!3,要有结束语4,要5句话左右哦】
- 在英语中,后面只能接动词不定式的词
- 【infrontof和atthefront的区别】
- 一些首字母填空题（初中英语水平）急!~~~在线等!拜托各位了1.Whenweseeatrafficaccidenthappen,weshouldr_____tothepolice.2.Icanfindsomei_____abouttheprojectontheinternet.3.Afteralongwalk,Ifelth_______4.
- 选词填空（小学英语）选择适当的词语填空,注意用适当形式runacross,haveaccessto,takeup,addup,straight,along1.Pleasege______aheadandtakethesecondturnonyourleft.2.YesterdaywhenI______thestreet,Ididn'tlookat
- 【八年级上英语短文填空,急Oneday,MrWhitefinishedhisworkvery_____,Onhiswayhome,therewerenopeopleandnobuses.Sohehadtogohomeon_____,Heheldhisinhis_____,Whenhegothome,heopenedhisbag.Hewantedtogetthekeys.Th】
- 【一个圆柱的体积是15立方厘米，与它等底等高的圆锥的体积是______立方厘米．一个圆锥的体积是141.3立方厘米，与它等底等高的圆柱的体积是______立方厘米．】
- 英语填空：1Canadais______thenorthofUSA2Theoldwomanistelling_____interestingstorytothechild3MimiandMickyare____theirgroupproject4LiYanisgoodatEnglish.Wemuststudyhard______her.5Shelearnedalot______theinter
- 【tape怎么读】
- 【sheisshortsoshesits()theclassrooma.nexttob.inthefrontofc.infrontofdatthebackof】
- 【英语翻译ThankyouforcontactingOnlineSupport.ItappearsyoueithermodifiedoremptiedyourshoppingcartbeforeAlipayhadachancetoconfirmthefundswerereceived.PleasekeepinmindproductspurchasedwithAlipaymaynotbeavailablefor】
- 【求作文,要求1.WhatdoyouthinkoftheseOxfordtraditions?2.Whattraditionsare】
- 【世界文化名人】
- Shoppingonlineiseasierthanactuallygoingtoastoreandsavesyourtime.However,it’snotalwayssoeasy.Sometimes,youmayhaveafew.AuniversitystudentnamedXuZijiaooftenbuysclothesTaobao.“Thecolors
- 英语填空题Ithinkyouhavetor_________,oryou'llbelatefortheexamIthinkyouhavetor_________,oryou'llbelatefortheexamDon'tworryaboutme,Mum.Ie_______tobebacknextMonday
- 【如题1."WhereisMary?""She__________toschool."A.willgoB.hasbeenC.hasgoneD.went2.Heaswellashisstudents,____________interestedinsports.A.areB.isC.wereD.was.3.Itwasgoingtorainjustnow；____________,itisclearnow.A.butB】
- mememoriesofspringfestival急用(150词)
- 【请教新概念英语的发音问题好；我学新概念英语第一册99课遇到了以下问题.我听不清它的发音,我是指85版的录音.Islippedandfelldownstairs.这句中的and我没听出来,不知它是如何发音的.Ithinkthat】
- 几个句子的发音困难!我在练口语,模仿磁带时就是听不出that怎么读,例如,Itwasgenerallysupposedthatitwouldnothappenagain.Itisexpectedthattheweatherwillbegoodsoon.还有,Wecouldn'taffordtokeepourcar,sowe
- 赞美河南的文章介绍河南的名胜古迹和名人.
- 【外语特别是英语高手来帮帮我挑本好词典我想买本辞典不是电子辞典就是书的不晓得是买牛津还是买朗文好我是初学者刚刚买了套新概念英语磁带版的那买什么词典好呢买词典好象有初】
- 英语口语发音不准,有时候感觉要领都抓住了,可听起来就是不对,怎么来纠音啊?
- 【辨析题马克思主义哲学是“科学的科学”】
- 阅读理解Maybeitistruethatwedonotknowwhatwehavegotuntilweloseitbutitisalsotruethatwedonotknowwhatwehavebeenmissinguntilitarrives．Ittakesanhourtol
- 求助!几道英语选择题~~Ifeelgreatlyhonored___intotheirsocietyA.towelcomB.welcomingC.tobewelcomeD.welcomedItiisworthconsideringwhatmakes"convenience'foodssopopuar,and__betteroneaofyourownA.introducesB.toin
- aheadof和infrontof的区别这两个短句的用法区别
- He()(connect)theprintertothecomputerbeforeIarrivedthere动词填空.、、
- 把一个圆柱削成一个最大的圆锥，圆锥的体积是9.42立方厘米，该圆柱的体积是______立方厘米．
- thereisapoliceman——————thebus中间是infrontof还是inthefrontofthereisapoliceman——————thebus中间是infrontof还是inthefrontof为什么?
- 英语短文填空Blairandhiswifewereworried.Theyfoundtheycouldnevergettheirtwofive-year-oldsonsaway(1)computersmobilephonesandtelevisions.Thekids(2)wantedtogooutsidetoplay."IlikedtoplayoutsidewhenIwasaboybutmyk