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1、中考数学复习专题2（Reviewofmathematicsinseniorhighschool2）Inthispaper,thecontributionoftheoxbrothertotheboardKingDOCdocumentsmayexperiencepoorbrowsingontheWAPside.ItisrecommendedthatyouselectTXTfirstordownloadthesourcefiletothelocalmachine.Figure109casesofHebei,HebeiasshowninFigure16,intheRtDeltaABC,DeltaAC,
2、C=90/deg=3,AB=5.PCCAfromthepointofthesecond1Unitslong.Speed,uniformmotion,returntoA;theuniformmotion,arriveatthepointimmediatelyafterAattheoriginalspeedalongtheACQAfromthepointofreturn;startingalongtheABto1unitspersecondlongspeedtoB.TheuniformmotionalongwithP,Qsports,DEPQandkeeptheperpendicularbisec
3、tor,PQ,movement,D,QB-BC-CP,AClinebasedonE.PQ,atthesametime,whentheQarrived.Atthesametime,startingwiththestopmotion,stop.StopmovingpointB,pointPwillstop.SetupP,QmovementtimeisTseconds(T>0),.AP,Q)toAC(distanceisthepoint;1T)=2,=)whenthemovementprocess,(2)inPfromCtoAintheprocessofmovement,andtheareaofde
4、ltaAPQandS)functionofT;donothavetowritethevaluerangeofT)function;(rangewithoutwritten)(theprocessofmovement,(3)inEfromBtoCintheprocessofmovement,canQBEDintoquadrilateral)isarighttrapezoid?Ifyoucan,thevalue.Ifnot,pleaseexplainthereason;forrightangletrapezoid?Ifyoucan,findthevalueoft.Ifnot,pleaseexpla
5、inthereason;thevalue.(4)whenDEgoesthroughthepointC,pleasewritethevalueoftdirectlyQDAPBECFigure16InFigure1,theAD(Hebei)Hebei)intherightangledtrapezoidABCD,letBC,C=90degrees,=16/=90,BC=16,DC=12,AD=21.fixedpointPstartsfrompointDandstartsat2=12/=21.inthedirectionofrayDA,Aunitoflengthofspeedofunitlongspe
6、edpointQfrompointCbasedonsegmentCBQCpersecond,atthesametimeofdeparture,1UnitslongspeedtothepointofB,P,respectively,fromthepointofviewofD,atthesametime,whentheQmovementpointtopointB,Pwiththestopmotion.Stopmotion.ApointalongthemovementtimeisTseconds().Thefunctionalrelationshipbetween;(1)adeltaBPQareai
7、sS,andthefunctionbetweenSandT;whyvalue,(2)whenthetwhytovalue.B,P,Qandthreepointsforthetrianglevertexisisoscelesthreeangle?Waisttriangle?(3)whenthelinePQandlineABintersectatpointO,and2AO=OB,andthevalue
