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如图,水平放置的三棱柱的侧棱长和底面边长均为2,且侧棱AA1⊥底面A1B1C1,正视图是边长为2的正方形,该三棱柱的侧视图面积为()。
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如图水平放置的三棱柱的侧棱长和底面边长均为2且侧棱AA1⊥底面
1
1
1
,主视图是边长为2的正方形,该三棱柱的左视图面积为( )
A.4B.
C.
如图水平放置的三棱柱的侧棱长和底边长均为2且侧棱AA1⊥平面
1
1
1
,正视图是正方形,俯视图是正三角形,该三棱柱的侧视图面积为 A.
B.
C.
侧棱垂直底面的三棱柱叫直三棱柱.已知直三棱柱ABC-A.1B.1C.1底面△ABC中CA=CB=1∠
如图直三棱柱的侧棱长和底面各边长均为其主视图是边长为的正方形则此直三棱柱左视图的面积为
如图已知正三棱柱ABC-A1B1C1的侧棱长和底面边长均为1M.是底面BC边上的中点N.是侧棱CC1
如图水平放置的三棱柱的侧棱长和底面边长均为2且侧棱AA1⊥底面
1
1
1
,主视图是边长为2的正方形,该三棱柱的左视图面积为( )
A.4B.
C.
如图水平放置的三棱柱的侧棱长和底边长均为2且侧棱AA1⊥面A1B.1C.1正视图是正方形俯视图是正三
4
如图三棱柱ABC-A1B1C1的侧棱长和底面边长均为2且侧棱AA1⊥底面ABC其主视图是边长为2的正
2
4
如图三棱柱的侧棱长和底面边长均为4且侧棱底面其正主视图是边长为4的正方形则此三棱柱侧左视图的面积为
4
8
一个四棱锥和一个三棱锥恰好可以拼接成一个三棱柱.这个四棱锥的底面为正方形且底面边长与各侧棱长相等这个
已知三棱柱ABC﹣A′B′C′的底面为直角三角形两条直角边AC和BC的长分别为4和3侧棱AA′的长为
一个三棱柱的底面边长都是1cm侧棱长都是3cm则它所有的棱长的和是cm.
一个三棱柱容器中盛有水侧棱AA1=8如图当侧面AA1B1B水平放置时液面恰好过ACBCA1C1的中点
如右图水平放置的三棱柱的侧棱长和底边长均为2且侧棱AA1⊥面
1
1
1
,正视图是边长为2的正方形,俯视图为一个等边三角形,该三棱柱的侧视图面积为( ) A.2
B.
C.2
4
如图已知正三棱柱底面是正三角形且侧棱垂直于底面的三棱柱ABC﹣
1
1
1
的各条棱长都相等,M.是侧棱CC
1
的中点,则异面直线AB
1
和BM所成的角的大小是 A.90°B.60° C.45°
30°
设正三棱柱的所有顶点都在一个球面上且该正三棱柱的底面边长为侧棱长为2则该球的表面积为________
2017年·上海中学模拟2斜三棱柱ABC﹣A′B′C′中底面是边长为a的正三角形侧棱长为b侧棱AA
一个四棱锥和一个三棱锥恰好可以拼接成一个三棱柱.这个四棱锥的底面为正方形且底面边长与各侧棱长相等这个
一个四棱锥和一个三棱锥恰好可以拼接成一个三棱柱.这个四棱锥的底面为正方形且底面边长与各侧棱长相等这个
如图三棱柱的侧棱长和底面边长均为4且侧棱底面其正主视图是边长为4的正方形则此三棱柱侧左视图的面积为
4
8
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athardchangeupbeforewinhappendownchoosepractisecomepartLifeisnoteasysoI’dliketosayWhenanything46believeinyourself!WhenIwasayoungboyIwastooshytospeaktoanyone.Myclassmatesoftenlaughed47me.Iwassadbutcoulddonothing.Latersomethinghappenedandit48mylife.ItwasanEnglishspeechcontest.Mymotheraskedmetotake49init.Whataterribleidea!ItmeantIhadtospeak50alltheteachersandstudentsofmyschool!Comeonboy.Believeinyourself!Youaresureto51ThenmotherandItalkedaboutmanydifferenttopics.AtlastI52thetopicBelieveinyourself.Itriedmybesttorememberallthespeechand53itover100times.Withmymother’sgreatloveIdidwellinthecontest.Icould54believemyearswhenthenewscamethatIhadwonthefirstplace.Iheardthecheersfromtheteachersandstudents.Thoseclassmateswhooncelooked55onmeallsaidcongratulationstome.
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Myparentstaughtmenottowastefood.Mymomalwaysfoundwaystomakeleftoverstastegood.IwenttoIlantolearnaboutsomeoftheirspecialfood.AsIwasthereIlearnedaboutthefoodandthehistoryofthearea.Ilearnedthattheydon’twastefoodeitherandtheyuseleftovers! Manyyearsagotherewasnotenoughfoodforeveryone.Peoplelearnedtocookandeatalmosteverything.Theyhadtothinkofwaystomakespecialdishes.Oneofthesedishesiskaozha.It’smadewithleftoverslikemeat;soupoilandfat.Thatmightnotsoundverygoodbutitdoestastegood.Todaykaozhaisaspecialdishatbigbanquets. Anotherfamousdishiscalledzaobing.It’smadewithfruitmeatandotherthings.Ireallylikedit!ButIdidn’twanttoeattoomuch.Ithasalotoffatinit. IsmelledsomethingburningandIsawsmokesoIfoundanotherspecialfoodoftheIlanarea—duckmeat.Theduckmeatisputinabigoventocookit.Smokekeepsthemeatfresh.Idon’tusuallyeatmeatbutthisduckmeatwasdelicious!Ittastedsweet. Ilanisagreatplacewithdeliciousfood.IhopeIcancomebackagain! Kaozhaisagooddishthatismadewith.
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