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在△ABC中,AC=6,BC=7,,O是△ABC的内心,若,其中0≤x≤1,0≤y≤1,动点P的轨迹所覆盖的面积为()。
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5<AC<12
已知△ABC中BC=5以BC为直径的⊙O.交AB边于点D.Ⅰ如图①若AC与⊙O.相切且AC=BC求B
已知△ABC中BC=5以BC为直径的⊙O.交AB边于点D.Ⅰ如图①若AC与⊙O.相切且AC=BC求B
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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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