1、 2017-2018 3 30 1 4 2 A 1 2 3 B 2 3 4 C 3 4 7 D 4 5 10 3 A 2 B 4C 5 D 6 4 ABC DEF E A 80 B 40 C 62 D 38 5 x A 50 B 60 C 70 D 75 6 CD AB D BE AC E BE CD O OB OC A 2 B 3 C 4 D 5 7 ABC DEF A AB DE B E C F B AC DE B E A F C AC DF BC DE C D D AB EF A E B F 8 OD MON A B C OM OD ON ( A B C A ) AB=BC, OAB B
2、CO A OAB+ BCO=180 B OAB= BCO C. OAB+ BCO=180 OAB= BCO D. A B C D 4 5 6 9 ABE AE MN BE C AB+BC=BE B ( ) A 50 B 45 C 60 D 55 10. P AOB M N OA OB PMN MPN=110 AOB=( ) A. 35 B. 40 C. 45 D. 50 ( 3 18 ) 11. 5 1 _ 12 3 _ 13 A O B AOB _ 14 AB CD P CD EBA EPC F F 40 E _ 15. ABO OB x A=2 ABO OC AOB AC=2 OA=3 B
3、 _ 16. ABC B=30 , AD , CAD=30 , CD=3, BC=_ 8 72 17 8 ABC B=2 A C= A-20 A . P A B O 第10 题图 第 9 题图 O A C x B y 13 14 15 18 8 B F C E AB BE DE BE AC DF AC DF BF CE AB DE 19. 8 ABC , A 60 ,P AB Q BC PA=CQ PQ AC D, PD=DQ, ABC . 20 8 ABCD ABC 150 BCD 30 M BC AB BM CM CD N AD BN CN D Q C A B P N A D B C M
4、21. 8 ABC A 2,1 B -1,3 C -3,2 1 ABC x 1 1 1 ABC 2 1 A 1 B 3 P a a-2 Q y PQ=8 P 22 10 ABC AC BC ACB 90 D BC E C AD CE AD AB F G BE BF GD (1) BEF (2) ADC BDG 23. 10 ABC ADE ,AB=AD,AC=AE, BAC DAE,BC DE O BAD= . (1) BOD= . (2) AO DAC, AC=AD. (3) C=30 OE AC F, AOF = . 24. 12 , A x B 0 -4 E -6,4 BA (1) A
5、BE . (2) y F, FEA=45 F . x y F A B E O F O A D E C B (3) M N x y MN=NB=MA I MON AI BI y x P Q , IH ON H, POQ C POQ. C POQ=2 HI. x y H Q P I M N A B E O 2017-2018 30 1 2 3 4 5 6 7 8 9 10 C B C D B C B C A A 18 11 5 12 13 SSS 14 80 15 5,0 16 12 6 17 8 A=x B=2x C=x-20 ABC A+ B+ C=180 x+2x+x-20=180 x=50
6、 A=50 18 8 BF=EC BC=EF AB BE DE BE B= E=90 Rt ABC Rt DEF AC DF BC EF B= E=90 Rt ABC Rt DEF Rt ABC Rt DEF HL AB=DE 19 8 P PE BQ AC E EPD= Q EPD CQD EPD Q PD QD PDE QDC EPD CQD ASA PE=CQ PA=CQ PE=PA PEA= A=60 PE BQ PEA= ACB=60 A= ACB= B=60 ABC 20 8 BN CD E ABC=150 BCD=30 ABC+ BCD=180 AB CD BAC= ADE AB
7、N EDN BAN EDN AN DN ANB DNE ABN EDN ASA BN=EN AB=DE AB=BM DE=BM CM=CD CB=CE BN=EN CN BN 21 8 2 1 A 2 -1 1 B -1 -3 3 P 4 2 -4 -6 A P B C Q D E A B N D C M E 22 10 1 DE E C AD AD CE CD=DE D CB CD=DE=DB DCE= CED DEB= DBE DCE+ CED+ DEB+ DBE=180 CEB=90 ECB+ ACF=90 CAF+ ACF=90 ECB= CAF ACF CBE CAF BCE AC
8、CB AFC CEB ACF CBE AAS CF=BE CF=EF EF=EB EFB 2 ACB AD M ACM CBG 45 CAM BCG AC CB ACM CBG ACM CBG ASA CM=BG DCM DBG 45 MC GB MCD GBD CD BD DCM DBG SAS ADC= GDB 23 10 1 ABC ADE AB AD BAC DAE AC AE ABC ADE SAS B= D BOD= BAD= 2 A AM BC M AN DE N ABC ADE S ABC=S ADE 11 22 BC AM DE AN BC=DE AM=AN AO BOE A
9、O DAC DAO= CAO BAO= EAO ABO AEO BAO EAO AO AO AOB AOE ABO AEO ASA AB=AE AB=AD AC=AE AC=AD 3 40 20 24 12 1 E EG x G B 0 -4 E -6,4 OB=EG=4 AEG ABO 90 EGA BOA EAG BAO EG BO AEG ABO AAS AE=AB A BE 2 A AD AE EF D D DK x K FEA=45 AE=AD AEG DAK D 1,3 F 0 y S EGKD=S EGOF+S FOKD 1 1 1 (3 4) 7 ( 4) 6 (3 ) 2 2
10、 2 22 7 22 (0, ) 7 yy y F 3 MI NI I MON NI MNO MI OMN MIN MIA MN MA NMI AMI MI MI MIN MIA SAS MIN= MIA MIN= NIB NI MNO MI OMN MON=90 MIN=135 MIN= MIA = NIB=135 AIB=135 3-360 =45 OI IS OM S, IH ON OI MON IH=IS=OH=OS HIS=90 HIP+ QIS=45 SM SC=HP HIP SIC IP=IC HIP= SIC QIC=45 QIP QIC PQ=QC=QS+HP C POQ=OP+PQ+OQ=OP+PH+OQ+OS=OH+OS=2HI P y N E A B Q H I M x O S C
