初中坐标系测试 3页

rectangularcoordinatesystem一、optionselectABC图11、asisshowedinthegraph,if(0，0)representspointA,(0，4)representsB，thentheCoordinatesofCis()A、(0，3)B、(2，3)C、(3，2)D、(3，0)3、twopointsonastraightlinethatparalleltox-axis,thentherelationshipbetweenthetwopointsis()A、horizontalcoordinatesisthesameB、verticalcoordinatesisthesameC、theabsoluteofthehorizontalcoordinatesisthesameD、theabsoluteoftheverticalcoordinatesisthesame4、ifA(-3，a)andB(3，-4)aresymmetrypointsabouttheorigin,thenthevalueofais()A、-4B、4C、4or-4D、uncertain5、ifP1(-4，3)andP2(-4，-3)，thentherelationshipbetweenP1andP2is()A、symmetryabouttheoriginB、symmetryaboutthey-axisC、symmetryaboutx-axisD、symmetricrelationdoesnotexist.6、knownpointthedistanceofPtox-axisis3,thedistanceofPtothey-axisis2,thenthecoordinatesofPis()A、(3，2)B、(2，3)C、(-3，-2)D、noanswersareright7、knownP(0，a)isonthenegativeofy-axis,thenthepositionofQ()lies()A、theleftofy-axisandabovethex-axisB、leftofy-axisandabovex-axisC、leftofy-axisandbelowx-axisD、rightofy-axisandbelowx-axis8、knowntheareaof△ABCis3，thelengthofBCis2，isBliesattheorigin,andBCliesonthex-axis,thentheverticalcoordinateofAis()A、3B、-3C、6D、±3二、blanks9、inaCartesiancoordinatesystem,thenumberofpoint(s)correspondingto(-1，2)is_____.10、asisshowedin图2，accordingtocoordinatepointlocation,writethefollowingcoordinates：A()，B()，C()，D()，E()，F()1●●●●●●ABCDEFOxy-1图211、knownthecoordinateofAinaplaneis(1，-2)(1)ifA、Baresymmetryaboutx-axis，thenthecoordinateofBis()，(2)ifA、Baresymmetryabouty-axis,thenThecoordinateofBis()，\n(3)ifA、Baresymmetryabouttheorigin,thenthecoordinateofBis()。ABCOy4-212、knownA(4，y)，B(x,-3),andAB∥x-axis，IfthelengthofABis5，thenx=_______，y=_______。13、ifpointMisonthey-axis，itsverticalCoordinatesis5，thecoordinateofPis(3，-2)，Thentheareaof△OMPis_______。14、intheparallelogramABCD,AO=5,thenthecoordinateofAis______,ThecoordinateofCis__________,theareaofparallelogramABCDis________.15、letP(-3，y)shiftdown3units，shift2unitstowardsleftandthenewpointisQ(x，-1)，thenxy=___________。16、knownpointA(3a+5,a-3)isontheanglebisectorofthesecondandforthquadrant,thena=_____.17、knownthecoordinatesoftheverticalsoftrapezoidABCDareA(1,3),B(1,1),C(5,1),D(3,3)respectively,shiftthetrapezoidtowardsleft2unitsandthendownwards3units,thenthenewcoordinatesofverticalsofthetrapezoidis_________,__________,___________,____________.theareaofthetrapezoidis__________.18、一个机器人从arobotwasstartfromOpoint，thengotowardseastandgoasfaras3mandreachedpointA1，thenitgoesnorthabout6mreachedpointA2,thenitgoeswestabout9mreachedpointA3,andthenitgoessouthabout12mreachedpointA4,andthenitgoeseastabout15mreachedthepointA5,accordingtothislaw，whentherobotwaldedtopointA6,thecoordinateofA6is_____________.19、knownlineMNisparalleltox-axis，andthelengthofMNis5，ifMis（2，-2），thenthecoordinatesofNis__________.三、answerquestions20、writeoutthecoordinatesofthemarkedpointsonthefish,andanswerthefollowingquestion：whatisthecharacteristicsofthepositionofpointBandE？ABCDEOxy图621、writeoutthecoordinatesoftheverticesof△ABCandcalculatetheareaofthistriangle.O图7ABC1xy\nFigure8CBA51oxy22、Asisshowninthegraph，in△ABC，thecoordinatesofthreevertexesofthistriangleisA(-5，0)，B(4，0)，C(2，5)，move△ABC2unitsalongthepositivedirectionofx-axis，thenmoveit1unitalongthenegativeofy-axisandweget△EFG。(1)writeoutthethreeCoordinatesofthevertexesof△EFG(2)findtheareaof△EFG。23、figure9isthedesignofakite.（1）writedowneachvertexthataremarkedonthecoordinates.（2）keeptheverticalcoordinatesremains，multiply2totheallthehorizontalcoordinates，thenwhatthenewcoordinatesofallthevertexes,trysketchthenewkiteonthecoordinate.（3）ifthehorizontalcoordinatesstaysthesame，buttheverticalcoordinatesaremultipliedby-2,thenwritedownthenewcoordinatesofeachnewvertexes.Andtrytosketchthenewgraphonthecoordinate.ABCDFE1xy图9