首页
试卷库
试题库
当前位置：
X题卡
>
所有题目
>
题目详情
如图，AB是⊙O的直径，点C在⊙O上，过点C的切线交AB的延长线于点D，∠ACD=120°，（1）求证：AC=CD；（2）若⊙O的半径为2，求图中阴影部分的面积．
查看本题答案
包含此试题的试卷
教案备课库《》真题及答案
点击查看
你可能感兴趣的试题
如图AB是半圆O.的直径C.为半圆上一点N.是线段BC上一点不与B.﹑C.重合过N.作AB的垂线交A
如图AB是⊙O.的直径C.D.是⊙O.上的点∠CDB=20°过点C.作⊙O.的切线交AB的延长线于点
如图点C.在以AB为直径的⊙O.上AD与过点C.的切线垂直垂足为点D.AD交⊙O.于点E.1求证AC
如图AB是⊙O的直径点C在⊙O上过点C作⊙O的切线CD交AB的延长线于点D若AC=CD=3求⊙O的半
如图AB是⊙O的直径C.D是⊙O上的点∠CDB=20°过点C作⊙O的切线交AB的延长线于点E则∠E=
如图AD是☉O.的直径AB是☉O.的切线MN是圆上两点直线MN交AD的延长线于点C.交☉O.的切线于
如图△ABC为⊙O.的内接三角形AB为⊙O.的直径过点A.作⊙O.的切线交BC的延长线于点D.1求证
如图AB是⊙O.的直径C.D.是⊙O.上一点∠CDB=20°过点C.作⊙O.的切线交AB的延长线于点
40°
50°
60°
70°
如图以线段AB为直径作⊙O.CD与⊙O.相切于点E.交AB的延长线于点D连接BE过点O.作OC∥BE
如图AB是⊙O.的直径C.D.是⊙O.上的点∠CDB=20°过点C.作⊙O.的切线交AB的延长线于点
如图AB是⊙O.的直径C.是⊙O.上的点过点C.作⊙O.的切线交AB的延长线于点D.若∠A.=32°
如图AB是⊙O的直径∠BAC=30°M是OA上一点过M作AB的垂线交AC于点N交BC的延长线于点E直
如图AB是半圆O.的直径C.为半圆上一点N.是线段BC上一点不与B.﹑C.重合过N.作AB的垂线交A
如图AB是⊙O.的直径弦CD⊥AB于点E.过点C.的切线交AB的延长线于点F.连接DF.1求证DF是
如图AB是半圆O.的直径C.为半圆上一点N.是线段BC上一点不与B.﹑C.重合过N.作AB的垂线交A
如图⊙O.的直径AB＝6cmD.为⊙O.上一点∠BAD＝30°过点D.的切线交AB的延长线于点C.求
如图⊙O.的直径AB＝6cmD.为⊙O.上一点∠BAD＝30°过点D.的切线交AB的延长线于点C.求
如图AB是圆O.的直径D.为圆O.上一点过D.作圆O.的切线交AB的延长线于点C.若AB=2BC求证
如图已知⊙O中直径AB与弦AC的夹角为30°过点C作⊙O的切线交AB的延长线于点DOD=30cm.求
如图AB为⊙O.直径C.是⊙O.上一点CO⊥AB于点O.弦CD与AB交于点F.过点D.作⊙O.的切线
热门试题
更多
1分﹣﹣﹣Whatprogrammeissoattractive? ﹣﹣﹣Theguardofhonor仪仗队ofthePLAaretakingpartintheparadeonRedSquare.excitingevent! A.Howa B.Whatan C.Howan D.Whata
5分选用方框内所给词的适当形式填空. 1.Roberthidhimselfthedoor. 2.Insummerthesunearlyandsetslate. 3.Heisahard﹣workingperson.Iamsurehewillbe. 4.Springandsummeraremyfavorite. 5.Hewasinjuredinacaraccident.
1分Don'tdrinkthe污染water.Itwillmakeyouill.
8分ThedaybeforeyesterdaywhenPeter'sfamilywerehavingdinnerFatherraisedaninterestingquestionWasthereanythinginourpastthatwefeelashamedofguiltyaboutorregretted?Maybewecanfindwaystosaysorryortakesomeactiontorightanywrongdoing.ThisseemedlikeaveryprivatematterbutPeterthoughtaboutitcarefullythewholenight. Peterrememberedanincidentfrommiddleschool.InhisschooltherewasaworkerNeilStonewhononeofthekidsliked.OnenightPeterandtwoofhisclassmatesdecidedtoplayatrickonhim.Theyfoundacanofredpaintandwroteontheschoolmainroadinbrightred:NeilStoneisafool!Thenextdaythewholeschoolsawthesewords.WithintwohoursNeilhadPeterandhistwoclassmatesinhisoffice.HisclassmatessaidthattheyhaddoneitbutPeterlieddenyingthetruth.Nooneevertalkedaboutit. ThismorningPeterwentbacktohismiddleschool.NeilStoneisstillworkingthere.SorryNeil.Doyoustillrememberwhathappenedtenyearsago?IwantyoutoknowthatIdidit.Iknewit!'Neillaughed.Theyhadagoodlaughandalivelydiscussion.Neil'sclosingwordswere:PeterIalwaysfeltbadforyoubecauseyourclassmatesgotitofftheirmindandIknewyouwerecarryingitaroundalltheseyears.Iwanttothankyouforvisitingme…foryoursake. Peterknowsthatnomatterhowdifficultthesituationisitisnevertoolatetoclearupthepastandmakeafreshstart. 1.WhatdidPeterrememberdoinginmiddleschool? A.Somethingfantastic. B.Somethingunpleasant. C.Somethingvaluable. D.Somethinguseful. 2.Whatdoestheunderlinedworddenyingmean? A.夸大 B.赞同 C.否认 D.承认 3.WhendidNeilknowwhowrotethewordsontheschoolmainroad? A.Tenyearsago. B.Thedaybeforeyesterday. C.Thismorning. D.NotuntilPetertoldhim. 4.Whatisthebesttitleforthispassage? A.Peter'sstory. B.Anunforgettablelesson. C.It'snevertoolate. D.Everydoghasitsday.
1分Theenergyfromthesunandwindisverycheapanditwillnever. A.comeout B.putout C.carryout D.runout
15分Whenyoustepintoanewenvironmentyoumusthaveastrongwishtofitin.Fittinginmeansmakingmorefriends1moreinfluence影响onothersandgettingmorechancestoliveahappierlife.Hereissome2thatcallhelpyou. Beconfident.Confidenceattractsmostpeople.Everyoneisspecialandthereisonlyonepersonlikeyouinthisworld.Spend3thinkingaboutyourstrongpoints.Ifsoyouwillbeabletobuildupconfidencestepbystep.Youwon'thavemuchdifficultyfittingin. Bekindtoeveryone.Kindnessisthebridgetoyourownhappiness.4peoplenoticeyourkindnesstheywillreturnitoneday.Alwaysgivemorethanyoureceiveandthinkmoreofothersthanof5.Apersonwhocaresforothersispopulareverywhere. Beactiveingroupactivities.Variousactivitieslikeplayingfootball6helpyoutobeknowntoothers.Youmayaddmorefriendstoyourcircle.Atthesametimeyou'llbeamazedtoseehowmuchtheylikeyou.7wastingtimebeingalonegoouttodanceandsingtogetherwithotherstodevelopfriendship. Beoptimistic乐观的.Optimismmakesbothyouandothersfeelpleased.Itmakesagoodfirstimpression印象.Apleasantsmilecoststhe8anddoesthemost.Humor幽默catchesothers'attentionaswell.Peoplewinlikeyouformakingthemlive9. Ifyoufollowwhatismentionedaboveyou10bypeoplearoundyou.Asaresultyouwillfitinverywellandenjoyyournewlife. 1.A.had B.tohave C.having 2.A.advice B.advices C.suggestions 3.A.sometimes B.sometimes C.sometime 4.A.Though B.When C.Until 5.A.you B.your C.yourself 6.A.can B.haveto C.needn't 7.A.Insteadof B.Aswellas C.Aslongas 8.A.1ittle B.less C.1east 9.A.friendly B.happily C.clearly 10.A.willaccept B.won'taccept C.willbeaccepted
1分Recyclingisonewaytoprotecttheenvironmentreusingis. A.another B.theother C.other D.other's
10分Emilyissohappy.Todayisherbirthday. Weareplayingabirthdaygameherbrothersaid.Youhavetofindyourgift.Hereisyourfirstclue.HegaveEmilyapieceofpaper.ItreadLookinsidethecar.Soshedid.Shefoundadogbonewithanothernote.EmilytookoffthenoteandbegantoreadGotothefrontporch.SoEmilyrushedthereandfoundabagofdogfoodwithanothernote.Shequicklyreadthenote.Lookinthehousebythebackdoor.Emilywenttothebackdoorandtherewasadog'sleash皮带.Hmmshethoughtadogbonedogfoodandadog'sleash…butwedon'tevenhaveadog.ThenoteontheleashsaidGooutside.SoEmilydid.Shesawareddoghouse!Thatmustbemynextclue+++++shethought.Shebegantowalkthere.Butbeforeshegottherealittlebrownpuppyranuptoher.Ohapuppy!shecried.AndshesawanoteanditsaidHappyBirthdayEmily!Emilywassohappy! Shelovedhernewlittlepuppy.IwillnameherHappybecauseithasmademesohappytodayEmilysaid.Shegavehermomdadandbrotherabighug. Thankyoushesaidwithasmile.ThisisthebestbirthdayI'veeverhad! 1.TheunderlinedwordcluemeansinChinese. A.线索 B.建议 C.方法 2.WhatdidEmily'sbrotherdo? A.Hetoldherhewaslate. B.Hecarriedherbooks. C.Hegavehercluestofindagift 3.Emilyfoundadog'sleash. A.inthedoghouse B.bythebackdoor C.atthefrontporch 4.WhatwasthegiftthatEmilygot? A.Adoghouse. B.Aleash. C.Apuppy. 5.Thepassageismainlyabout. A.Emily'sfamily B.abirthdaygame C.abirthdaycake
1分MostoftheyoungpeopleenjoyJayChou'ssongs. A.sing B.sang C.singing
1分﹣WhydidyouleaveHaikoulastyear? ﹣BecauseIanewjobinWanning. A.offered B.wasoffered C.amoffered
1分小女孩太害怕了不敢告诉家人真相..
1分Ifitraintomorrowwe'llgohiking. A.won't B.doesn't C.don't D.didn't
1分﹣﹣﹣What'sthetoday?﹣﹣﹣It'snearly90°Fahrenheit.
1分Ithinkthesecamerasarethose导演.Pleaselookafterthem.
1分ThereagreatconcertinthetheaternextFridayevening. A.willbe B.willhave C.has
1分单词辨音找出画线部分与其他单词发音不同的选项 A.season B.leader C.ready
1分MyfriendMikewillcelebratehisbirthdayJanuary. A.in B.on C.at
10分A:HelloRichard.Wehaven'tseeneachotherforseveraldays.How'severythinggoingwithyou? B:Notbad.1 A:Prettygood!AreyoufreethisSaturdaymorning? B:2What'sup? A:Thereisgoingtobeafootballmatchinourschool.3 B:Yesofcourse.Butwhichteamisourschoolgoingtoplayagainst? A:4 B:Really?Ithinkourteamisverystrong.Perhapswewillwinthematch. A:ButIhearthattheirteamisstrongtoo. B:I'msureitmustbeawonderfulmatch. A:Ithinkso. B:5 A:Let'smeetintheplaygroundat9:00am. B:OK.Seeyouthen. 1. 2. 3. 4. 5.
1分Icefishingapopularwintersportisinmanywaystoregularfishing.相似的
1分Mandeepcangotoschoolnow.UNICEFhaspaidforher. A.education B.vacation C.competition D.invention
1分─Whydidyoupullthegirl? ─Youseetrafficwassobusythatanythinghappentoheratthatmoment. A.could B.should C.may D.must
1分﹣isthehistoryofXiamenUniversity?﹣Aboutninetyyears.A.Howfar B.Howsoon C.Howlong
1分WhatisthewayGeorgethoughtofenoughmoneytobuythehouse? A.got B.getting C.get D.togetw
1分Thesepensandpencilsare我们的.
1分﹣Whattimeshallweleavefortheairport? ﹣It'sfoggytoday.I'mnotsurebeclosedsoon.Let'sgonow. A.whetherthehighwaywill B.whetherwillthehighway C.whenthehighwaywill D.whenwillthehighway
10分Therewasastoryabouthowthealphabet字母表wasmade.IntheearlytimestherewasagirlnamedTaffy.Shelivedinacave洞穴withherparents. OnedaywhenTaffyandher1werefishingTaffyhadanidea.Sheaskedhimtomakeasound. Ahhesaid.Isthatwhatyou2? Yes!saidTaffy.That'sagreatsound.Youlooklikea3withitsmouthopen! Don'tberudesaidherfather. Idon'tmeantobe4Taffysaid.Shetookashark'stoothandbegandrawing5sometreebark树皮.I'mgoingtodrawafishwith6mouthopen. Why?askedherfather. Don'tyousee?repliedTaffy.IcandrawthispictureanditwillremindyouofthenoiseImadewhenIscaredyou! 7saidherfatherwhowasnowvery8. Shedrewapicture.ItlookedliketheletterA. Willyoubesurprisedwhenyouseethis?askedTaffy. Ohyessmiledherfather.Iwillrememberwhenyousaid‘Ah!'and9me.That'sinteresting. TherestofthedayTaffy'sfathermadeasoundandthenTaffydrewthesound.WhenherfathersaidOoh!itbecamearoundegg.ItlookedliketheletterO.TheSshsoundwasasnake.Itlookedlikethe10S.Theydrewallthesoundpicturestheywanted.Therewere26soundpicturesandthatwasthealphabet. 1.A.father B.aunt C.mother 2.A.found B.looked C.wanted 3.A.fish B.cat C.duck 4.A.happy B.rude C.polite 5.A.under B.on C.at 6.A.her B.its C.his 7.A.Goon B.Turndown C.Godown 8.A.easy B.interested C.hard 9.A.heard B.followed C.scared 10.A.number B.letter C.animal
1分Duringthe30thSummerOlympicGamesmanyyoungChineseatheletsgaveusawonderfulshowandhelpedChinaget88奖牌inall.
1分﹣Areyousureyoucandowellintomorrow'stest? ﹣.I'vegoteverythingready. A.Ithinkso B.Iamafraidnot C.Itishardtosay
10分我市正在开展美丽城市的活动.美丽城市不仅需要美丽的环境更需要文明的市民.请你根据提示写一封倡议书呼吁中学生从我做起为建设美丽城市贡献一份力量.80词左右.文章的开头和结尾已给出不计入总词数. 提示: 1.从小事做起保护环境; 2.节约用水用电; 3.使用礼貌用语告别不文明行为. 参考词汇: rideabikeonfootsaveturnoffelectricitythankyoupleasesorrybehaveproperly Everyoneisresponsibleformakingourcitymorebeautiful.Asstudents______Ibelieveourcitywillbecomemoreandmorebeautiful.
1分根据句意填空 Ican'topenthedoorbecauseIhavelthekey.
热门题库
更多
教案备课库
教案备课库
教案备课库
教案备课库
教案备课库
教案备课库
教案备课库
教案备课库
教案备课库
教案备课库
高一下学期数学
教案备课库
高一上学期数学
高一上学期化学
教案备课库
教案备课库
湘公网安备 43130202000226号