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关于BC4.AC的百科

如图，在矩形ABCD中，AB=3，BC=4．M、N在对角线AC上，且AM=CN，E、F分别是AD、BC的中点．...
AC adapter造句怎么写

  • AC adapter造句怎么写

  • 1、90-wattACadapterandpowercord2、"RechangethebatteryorplugtheACadapteroutputintotheACadapter3、PlugtheACadapterinandprintagain.4、ThebalanceispoweredbyanACadapter.5、PlugintheACadapterandrestartyournotebook.6、Whenusingthepowercable,insertthepowerc...
  • 24517
如图，在△ABC中，AB＝AC，∠A＝36°，BD平分∠ABC交AC于点D，若AC＝2，则AD的长是(   )...
如图，在▱ABCD中，AC是对角线，BE⊥AC，DF⊥AC，垂足分别为点E，F，求*：AE=CF．

  • 如图，在▱ABCD中，AC是对角线，BE⊥AC，DF⊥AC，垂足分别为点E，F，求*：AE=CF．

  • 问题详情：如图，在▱ABCD中，AC是对角线，BE⊥AC，DF⊥AC，垂足分别为点E，F，求*：AE=CF．【回答】【解答】*：如图， ∵四边形ABCD是平行四边形，∴AB=CD，AB∥CD，∴∠BAE=∠DCF．又BE⊥AC，DF⊥AC，∴∠AEB=∠CFD=90°．在△ABE与△CDF中，，∴得△ABE≌△CDF（AAS），∴AE=CF．知识点：各地中考题型：解答题...
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AC contactor造句怎么写

  • AC contactor造句怎么写

  • UsingACcontactorformotor’sphasebreakprotectionisimproperInsideisinstalledACcontactor,thermalreplay,self-settableconversionswitch.FuzzyComprehensiveEvaluationandControlofBestClosingMakingAngleofRotationalACcontactorTheutilitymodelbelongstoasilencinga...
  • 26748
已知点B在直线AC上，AB=8cm，AC=18cm，p、Q分别是AB、AC的中点,则PQ=
如图，∠A=∠E，AC⊥BE，AB=EF，BE=10，CF=4，则AC=　　．

  • 如图，∠A=∠E，AC⊥BE，AB=EF，BE=10，CF=4，则AC=　　．

  • 问题详情：如图，∠A=∠E，AC⊥BE，AB=EF，BE=10，CF=4，则AC=．【回答】6．【考点】全等三角形的判定与*质．【分析】由AAS*△ABC≌△EFC，得出对应边相等AC=EC，BC=CF=4，求出EC，即可得出AC的长．【解答】解：∵AC⊥BE，∴∠ACB=∠ECF=90°，在△ABC和△EFC中，，∴△ABC≌△EFC（AAS），∴AC=EC，BC=CF=4，∵EC=BE﹣BC=10﹣4...
  • 17784
如图，D、E分别是AB、AC的中点，CD⊥AB于D，BE⊥AC于E，求*：AC=AB．

  • 如图，D、E分别是AB、AC的中点，CD⊥AB于D，BE⊥AC于E，求*：AC=AB．

  • 问题详情：如图，D、E分别是AB、AC的中点，CD⊥AB于D，BE⊥AC于E，求*：AC=AB．【回答】【考点】轴对称的*质；全等三角形的判定．【专题】*题．【分析】作辅助线：连接BC，由CD垂直于AB，且D为AB中点，即CD所在直线为AB的垂直平分线，根据线段垂直平分线上的点到线段两端点的距离相等，得到AC=BC，又E为AC...
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题面：如图，已知AC⊥BC，BD⊥AD，AC与BD交于O，AC=BD．求*：(1)BC=AD；     (2)...
如图，在△ABC中，AB=AC，AC的垂直平分线分别交BC、AC于点D、E.   (1)若AC=12，BC=1...
AC adaptor造句怎么写

  • AC adaptor造句怎么写

  • Two-waypowersupplyletsyouuseeitherbatteriesorACadaptor(soldseparately).ConsumablessuchasACadaptorarecoveredforupto3monthsfromthedateofpurchase....
  • 32854
power AC造句怎么写

  • power AC造句怎么写

  • HXN5High-powerACDriveDieselLocomotiveCarbodyofNXN3high-powerACdiesellocomtoveThepaperintroducesanovelmicrocomputer-basedwithnon-contacttechnicalityofthehighpowerACcompensatedstabilizer....
  • 7966
如图，AB＝AC，AB⊥AC，AD⊥AE，且∠ABD＝∠ACE．求*：BD＝CE．

  • 如图，AB＝AC，AB⊥AC，AD⊥AE，且∠ABD＝∠ACE．求*：BD＝CE．

  • 问题详情：如图，AB＝AC，AB⊥AC，AD⊥AE，且∠ABD＝∠ACE．求*：BD＝CE．【回答】*：∵AB⊥AC，AD⊥AE，∴∠BAE+∠CAE＝90°，∠BAE+∠BAD＝90°，∴∠CAE＝∠BAD．又AB＝AC，∠ABD＝∠ACE，∴△ABD≌△ACE（ASA）．∴BD＝CE．知识点：各地中考题型：解答题...
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TheaverageFacebookuserintheUnitedStateshas245friends,ac...

  • TheaverageFacebookuserintheUnitedStateshas245friends,ac...

  • 问题详情：TheaverageFacebookuserintheUnitedStateshas245friends,accordingtoastudy________inFebruary.A．publishing B．publishedC．publish D．topublish【回答】B知识点：非谓语动词题型：选择题...
  • 23671
OneOctobermorning,Igotofftheall-nighttraininMandalay,ac...

  • OneOctobermorning,Igotofftheall-nighttraininMandalay,ac...

  • 问题详情：OneOctobermorning,Igotofftheall-nighttraininMandalay,acityinMyanmar.Aroughmancameupandofferedtoshowmearound.ThepriceheaskedwaslessthanIwouldpayforabarofchocolateathome.SoIclimbedintohistrishaw(三轮车).Ashewasshowingmearound,hetoldmehowhehadco...
  • 32127
已知：AB=AC，且AB⊥AC，D在BC上，求*：．

  • 已知：AB=AC，且AB⊥AC，D在BC上，求*：．

  • 问题详情：已知：AB=AC，且AB⊥AC，D在BC上，求*：．【回答】*见解析【分析】作AE⊥BC于E，由于∠BAC=90°，AB=AC，得到△BAC是等腰直角三角形，再由等腰直角三角形的*质得到BE=AE=EC，进而得到BD=AE－DE，DC=AE+DE，代入BD2+CD2计算，结合勾股定理，即可得到结论．【详解】作AE⊥BC于E，如图所示．∵AB=AC，且AB⊥...
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如图，在△ABC中，AC=BC，∠ACB=90°，AE平分∠BAC交BC于E，BD⊥AE于D，DF⊥AC交AC...

  • 如图，在△ABC中，AC=BC，∠ACB=90°，AE平分∠BAC交BC于E，BD⊥AE于D，DF⊥AC交AC...

  • 问题详情：如图，在△ABC中，AC=BC，∠ACB=90°，AE平分∠BAC交BC于E，BD⊥AE于D，DF⊥AC交AC的延长线于F，连接CD，给出四个结论：①∠ADC=45°；②BD=AE；③AC+CE=AB；④AB﹣BC=2FC；其中正确的结论有(    )A．1个 B．2个  C．3个 D．4个【回答】D【考点】全等三角形的判定与*质；角平分线的*质；等腰直角...
  • 6072
已知:如图,四边形ABCD的对角线AC,BD交于点O,BE⊥AC于E,DF⊥AC于F,点O既是AC的中点,又是...
DoyouknowwhatschoollifeislikeinSingapore?InSingapore,ac...

  • DoyouknowwhatschoollifeislikeinSingapore?InSingapore,ac...

  • 问题详情：DoyouknowwhatschoollifeislikeinSingapore?InSingapore,aclassonlylastshalfanhour,buttherearenobreaksbetweenclasses.Thestudentsonlyhavea30-minuteteabreakafter3or4classes.Theydonotdoeyeexercises.YaoSuyusaidoureyeexerciseswereunfamiliar(不熟悉)toh...
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DC/AC造句怎么写

  • DC/AC造句怎么写

  • 1、AC/DCandDC/ACConvertyCircuitsinPowerSupplyEquipment;2、StudyonDoubly-fedInductionGenerationSystemwithAC/DC/ACExcitationConverter;3、ElectroMagneticCompatibilityDesignofAC/DC/ACConverterUsedinWindPowerGenerator;4、ResearchontheDC/ACInverterSupplies...
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MoreAmericanpeopletaketheirtroubleswiththemonholiday,ac...

  • MoreAmericanpeopletaketheirtroubleswiththemonholiday,ac...

  • 问题详情：MoreAmericanpeopletaketheirtroubleswiththemonholiday,accordingtoanewsurvey.Although40percentsaidthatthemainreasonforgoingawayistoescapepressure(压力)fromwork,almostallsaidtheyworrymorethantheydoathome.Onlyfourinevery100saidthattheyarehappyand...
  • 24573
AC supply造句怎么写

  • AC supply造句怎么写

  • 1、AutomaticexchangeforDCandACsupply.2、DisconnecttheACsupplyleadplugfromtheACoutletwhentheunitinnotituseforextendedperiods.3、RemovetheACsupplyleadbeforeservicingorcleaningheads,rolleretc.4、InsertingtheACsupplyleadintotheunitautomaticallydisconnect...
  • 32735
如图，AD⊥AE，AB⊥AC，AD＝AE，AB＝AC.求*：△ABD≌△ACE.               ...
AC造句怎么写

  • AC造句怎么写

  • FouriertransformACvoltammetrysiliconcontrolledvoltagestabilizedAClightadjusterAC,DCorAirmotorpoweroptions.ResearchonSinglePhaseAC/ACOnvertersBasedonSimpleTopologies;ThevariablefrequencyACcontrollermountsdirectlyontheACmotor.TheACoutletishousedinrobus...
  • 11340
已知：如图，DE⊥AC，BF⊥AC，AD=BC，DE=BF，.求*：AB∥DC

  • 已知：如图，DE⊥AC，BF⊥AC，AD=BC，DE=BF，.求*：AB∥DC

  • 问题详情：已知：如图，DE⊥AC，BF⊥AC，AD=BC，DE=BF，.求*：AB∥DC【回答】.∵DE⊥AC,BF⊥AC,∴∠AED=∠CFB=90°∠AFB=∠CED=90°…………1分在Rt△ADE和Rt△BCF中∴Rt△ADE≌Rt△BCF(HL)…………3分∴AE=CF…………4分∴AE+EF=CF+EF 即AF=CE…………5分在△AFB和△CED中…………7分...
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