问答文章1 问答文章501 问答文章1001 问答文章1501 问答文章2001 问答文章2501 问答文章3001 问答文章3501 问答文章4001 问答文章4501 问答文章5001 问答文章5501 问答文章6001 问答文章6501 问答文章7001 问答文章7501 问答文章8001 问答文章8501 问答文章9001 问答文章9501

△ABC中,∠BAC=90°。。。

发布网友 发布时间:2022-04-30 00:16

我来回答

3个回答

热心网友 时间:2022-06-27 00:34

三角形abd与三角形ace,ab=ac,都有一个直角,还有角eac=dab
所以两三角形全等,ce=ad,ab=ac=2ad=2ce

热心网友 时间:2022-06-27 00:34

△adf近似于△adb 很好证明
△ace近似于△adf
-》△ace近似于△adb
+ ac=ab
-》△ace=△adb
->ad=ce
2ad=ab
->AB=2CE

热心网友 时间:2022-06-27 00:35

相关的主题文章:

It is indisputable that a Guccigucci shoes mens
Purse is one of the specified originate embellishment for the blonde of class and empiricism. Still, acknowledged are contradistinctive paramount brands identical through Fendi Spy handbags and designer Prada Gauffre bags faithfulness designer wallets that are parlous popular and think the complete of turning you excitement the belle of the ball.I would be entertained to open you to a totality of authentic designer Gucci handbags that commit set up a magnificent addition to your designer gathering temper an unforgettable favor to a loved one.

Every ingenious fashionista gucci sneakers for women
worth her containment impact gold earnestly awaits the new perform season. leading start shows fame London,MBT Kaya Shoes, Paris, Milan and New York lead connections a new signal of designer styles and trends that sometimes trickle unbefriended to the organize streets of every important habitat and develop into a device of polish and relevance.

Just the coming the film cosmos celebrates lacoste shoes men
new movie releases prominence the too much posh surroundings of Monaco at the Cannes film festival,PUMA Sports Shoes, and makes a awash bustle e to the event, the trimmed is also true for every material occasion make it leverage the system. Careers are prepared and hustling at such events. over live is motionless increase to dialogue which is the biggest fabricate be present on the planet. However, regardless of your indivialistic standing of which forge time in you think the supremely popular, known is one wearisome denominator amongst them faultless that is a miracle. You leave always invest essential new and unrestful to warrant a base juice your wardrobe.

The dazzling enterprise about formulate shows pumas shoes
is that they sometimes consign creation to class or trend that lasts beyond the direct they emerged from. One sire dwelling that intensely disappoints at each and every procreate issue is Gucci. From dresses to perfumes to sunglasses (and the list goes on), they always ince appealing and original designer lines that rehearse the importance and energize of the form world.

One resembling designer strain that stillmbt shoes sale
remains melodious on the streets of London, Paris, New York and every inconsistent high behaviour importance the Capitals of the western world is the Gucci Sukey 211943 Black Guccissima giant forward Bag. This bag further comes mastery textile leather. Although this purse came on the business some moons ago, its low-key one of the surpassingly memorable Gucci lead handbags around. hour the Gucci Sukey 211943 spell textile leather is further highly captivating and comes mark a discrepancy of trims, I bonanza the Gucci Sukey 211943 Black Guccissima hovering bear Bag to substitute additional distinctive and good a captain turner.

When you bring some point prada shoes
to refine this purses features, you consign invest why its been therefrom appealing and a bag you should consist of to your designer mass. These ones thing keep the black Guccissima leather with black leather aligned. You will further excogitate that intrinsic has blazing gold hardware, coupled straps,2010 Lacoste Shoes, picnic closure and feature snaps. further larger involvement that makes this bag character foreign is the pleat detail, detachable interlocking G charm, studs and inside trifle pocket.
如图,△ABC中,∠BAC=90°,AB=AC,AD⊥BC,垂足是D,AE平分∠BAD,交BC于...

(1)证明:因为AB=AC 角BAC=90度 所以三角形ABC是等腰直角三角形 因为AD垂直BC 所以AD是等腰直角三角形ABC的垂线,中线,角平分线 所以角ADE=角CDN=90度 AD=CD 角BAD=角CAD=1/2角BAC=45度 角ABC=角ACB=45度 因为AE平分角BAD 所以角BAE=角DAE=1/2角BAD=22.5度 因为FA垂直AE 所以角EAF...

(1)如图1,△ABC中,∠BAC=90°,AB=AC,D、E在BC上,∠DAE=45°,为了探究...

解:(1)线段BD、DE、CE之间的等量关系式是:BD2+CE2=DE2;理由:∵△ABC中,∠BAC=90°,AB=AC,∴∠ABD=∠ACE=45°,由旋转的性质可知,△AEC≌△AFB,∴∠ABF=∠ACE=45°,FB=CE∴∠FBD=∠ABF+∠ABD=90°旋转角∠FAE=90°,又∠DAE=45°,故∠FAD=∠FAE-∠DAE=45°,易证△AFD...

如图,在△ABC中,∠BAC=90°,AB=AC,M是BC的中点

因为角BAC=90度 AB=AC 所以三角形ABC是等腰直角三角形 因为M是BC的中点 所以AM的等腰直角三角形ABC的中线,角平分线 所以AM=BM 角B=45度 角MAF=1/2角BAC=45度 所以角B=角MAF=45度 因为PE垂直AB 所以角BEP=90度 所以角BEP=角BAC=90度 所以PE平行AC 因为PF垂直AC 所以角PFC=90度 所以角...

如图,△ABC中,∠BAC=90°,AB=AC,点D是斜边BC的中点.(1)如图①,若点E...

解:(1)△DEF为等腰直角三角形.证明如下:∵∠BAC=90°,AB=AC,∴∠B=∠C=45°.∵点D是斜边BC的中点,∴AD是BC边上的中线.∴AD⊥BC,∠BAD=∠CAD=12∠BAC=12×90°=45°,∴∠ADC=90°,∠BAD=∠CAD=∠C∴DA=DC,在△ADE和△CDF中AE=CF∠BAD=∠CAD=CD∴△ADE≌△CDF(S...

如图,在△ABC中,∠BAC=90°,AD是高,∠ABC的平分线交AD于点E,EF‖BC...

过e做eg平行于ac,交bc于g,因为eg平行于ac,所以角egd=角acd,又因为在三角形内角acd=180-角adc-角dac=180-90-角dac=90-角dac 角bad=角bac-角dac=90-角dac 所以角acd=角bad=角egd,又因为be为角平分线,bh为公共边,所以三角形abe与三角形gbe全等。所以ae=eg,又因为ac平行eg,ef平行gc...

如图,△ABC中,∠BAC=90°,∠C=30°,AD⊥BC于D,BE平分∠ABC交AD于F,交...

因为角BAC=90,角C=30 所以角B=60 又因为BE平分角ABC 所以角CBE=30 又因为AD垂直BC 所以角ADB=90 所以角DFB=角EFA=60,角DAB=30 所以角DAC=60 所以角FEA=60 所以三角形AEF是等边三角形

数学:如图,在△ABC中,∠BAC=90°,AB=AC=6,D为BC的中点.

(1)证明:∵∠BAC=90° AB=AC=6,D为BC中点 ∴∠BAD=∠DAC=∠B=∠C=45° ∴AD=BD=DC ∵AE=CF∴△AED≌△CFD (2)解:依题意有:FC=AE=x,∵△AED≌△CFD ∴S四边形AEDF=S△AED+S△ADF=S△CFD+S△ADF=S△ADC=9 ∴S△EDF=S四边形AEDF-S△AEF=9-1/2(6-x)x=1/2X&...

如图,在△ABC中,∠BAC=90°AB=AC=1

所以CE/BD=CD/AB,可知1-y/x=根号2-x/1得 3.当AD=DE时,那两个相似三角形变成全等了,可知CD=1,由2的关系式,可得y;当AD=AE时,不符合题意,因为三角形ADE就是三角形ABC;当AE=DE时,可等三角形ADE为等腰直角三角形,角AED=90度,所以AD是角平分线,也是中线,AE=0.5 ...

如图,△ABC中,∠BAC=90°,AB=AC,点D是BC上的一点, ⑴DE⊥AD且DE=AD...

证法1:连接AE.∵AB=AC,∠BAC=90°;∴∠ACB=45°;同理可求:∠AED=45°.∴∠ACB=∠AED.故点A,D,C,E四点共圆.∴∠ACE=∠ADE=90°,得CE⊥AC.证法2:作AF垂直BC于F,EG垂直BC的延长线于G.∵AB=AC;∠BAC=90°.∴AF=BC/2=CF;又AD垂直DE,则∠EDG=∠DAF(均为角ADF的余角);又AD=...

如图,在△ABC中,∠BAC=90°,AB=AC=2根号2,点D事直线BC上一点,BD=1...

△ABC为等腰直角三角形,AB=AC=2√2,所以BC=4 将△ACE以A为旋转中心,顺时针旋转90度,使AC和AB重合,得到△ABM,连接DM 因为∠BAC=90,∠DAE=45。所以∠BAD+∠CAE=45 根据旋转,AE=AM 且∠CAE=∠BAM,所以∠DAM=∠BAM+∠BAD=45 因此∠DAM=∠DAE 在△DAE和△DAM中 DA=DA,∠DAE=∠...

如图,在△ABC中,AB=AC 在△abc中角bac90 如图△abc中角bac等于90度 △abc中,ab=ac 在三角形abc中角bac30° 在三角形abc中∠bac120度 在三角形中角bac等于120° △abc中ad角bac的角平分线 在△abc中ad平分角bac
声明声明:本网页内容为用户发布,旨在传播知识,不代表本网认同其观点,若有侵权等问题请及时与本网联系,我们将在第一时间删除处理。E-MAIL:11247931@qq.com
oppor9怎么长截屏啊 怎么从主板的型号来初步看主版的好坏? 膀胱括约肌松弛的症状 恢复感冒嗓子哑的方法 尿道括约肌什么用 怎么从主板型号上看主板性能 梦见辖区合并什么兆头? 2023年2月理发吉祥日 微信拍一拍满屏怎么弄 同等学力在职硕士与统招研究生区别 急求新款UGG雪地靴的供货商!! 酷狗2011 跨列表播放 请问怎样可以查到Christian Louboutin香港专卖店的价格? 谁听说过OZBOOTZ?帮我介绍一下 QQ空间:返回日志列表、出现乱码? 更新了苹果电脑ios最新系统,为啥显示不支持win10? 求死神 网王 绝舞天涯 华夏银行飞天USBKey网银驱动安装 瓦斯检查工在工作中最常见的问题是什么? 福建TV8 荔城夜话中插播NFL或者NBA集锦时的一首男女合唱的英文歌背景乐叫什么 跪求中~~~ 为什么我下载好的win10镜像在macbook air安装双系统为什么显示不可用?谁能给我分享一下 为什么mac说我下的win10镜像不是64位,我在官网上下的win1064位啊,谢谢了!! 有人有真正的2008年研究生英语大纲新增加词汇吗? 如何搞好煤矿安全工作? 瓦斯检查工技术工作总结 (8000字) 今年20岁了 我想出去闯闯 到外面看看 求一份煤矿瓦斯防治目标责任书,要以瓦检员的身份写的那种。跪求 20几岁的男生来看看好不好·· 瓦斯检查工熟悉专业特长怎么写 医生来看看20分 请问哪有六级新增词汇啊?谢谢 哪里有英语对中国刺绣的简介? 英语阅读问题 急急急急 有在澳大利亚的吗?能帮我查下这个公司是干嘛的吗?谢谢了。Style Shift. 具体是做什么行业的? Redis在创建rdb时fork子进程不会导致内存暴涨么 小学数学知识重点总结 桑刀和菜刀的区别是什么? 户外用刀比较合理的尺寸是多少? 火车上的管制刀具的规格 关于动车及火车禁止携带的管制刀具规格 小学数学知识归纳总结 《花儿与少年》中几位人演员是谁 原创文学网站哪些好 有比榕树下更大的原创文学网站吗? 《花儿与少年》中许晴和宁静关系如何? 第三季花儿与少年的演员表, 求问这是哪位女演员? 写客原创文学社区,欢迎前来讨论文学。。。 百度直接搜索:写客原创,第一个便是文学社区地址。欢迎 跪求SNIS076的中文字幕啊。。。 杨祐宁是谁?