2021-2022学年广西防城港市七年级（下）期末数学试卷（附答案详解）

《2021-2022学年广西防城港市七年级（下）期末数学试卷（附答案详解）》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

202L2022
■
ᦪᔁI.ᑡᵫᑮḄ2.ᑡ〉"ᐰ☢ḄA.᧡⁚ὶ()*ᦈ,᳛B.=>ᡃḕABḄCDEFC../0ᢇᵯ34Ḅ5ᵨ78D.=>ᡃ᪥
B᪥HIṹEF3.92,-3
ᑮx:Ḅ;<A.2B.3C.5D.14.KLMNA8,COOPQ9O,NZ0C=40஺SᑣU4஺஺ḄVᦪWA.40°B.100°C.50°D.140°5.᝞YZ[j\]2x-ay=5Ḅ0>S^_aḄ`WA.-1B.1C.2D.36.᝞SKLU4=NBEF,^_A.AD//BCB.AB//CDC.EF//BCD.AD//EF7.᝞S/abcᕒefᡂh⌱jḄABḄkVSᐸmnA.o9pq0ᩩMNB.o9stMNᨬvC.o9stNwᨬvD.ᚖNwᨬv8.ᑡyz{pḄA.—V81=—9B.VT6=+4C.V9=3D.2
2=—29.|x

1A.x2y—310.AzᑴᦪᳮⅾAᨵ᪵0⚪“¡ᓛஹ¤¥ᜮSᐳ¨¡ᓝªo(ᡃ¬®ᓫ°)²³ᓛஹ¤´ᜮSᐳ¨³ᓝªo.µஹ¤ᔜ¨·¸¹”»¼ᓛxoS¤¼ᜮyoS᪷n⚪¾¿ᑡ\]ÀW()C6x+4y=48„C6x+4y=38A(5x+3y=38(5x+3y=48È(4x+6y=48É(4x+6y=38l3x+5y=38U'(3x+5y=48A.120°B.122°C.58°D.146°12.᝞Sᙠ☢MÐᙶ᪗ÓAS94(1,1),8(3,1),C(3,3),0(1,3),c9PÖ9A×ØSÙ¼Ú1ᓫ°kVḄÛVÜAB-BC--—…ÞNbcSßbcᑮ2022ÚàS9PḄᙶ᪗W()01234XA.(1,1)B.(3,1)C.(3,3)D.(1,3)13.81Ḅ\᪷.14.8⚪“a,b,cMNS|alb,blc,ᑣale”.(åᑏ“ç8⚪”ᡈ“Ꮇ8⚪”)15.Ö᪥
Aêj400ëBS᪥
BìíîᵨQïᦪðñḄàtS᪵òóa.16.ᑏ×0>WḄ[ᐗ0õ\]À.17.KL+|y-1|=0,ᑣ9M(x,y)ᙠùú▲.18.᝞S■Ḅ0ᩩüÞýᑮþÿ
◤⌕
᝞4=130°,Ḅ48=160஺
Ḅ4C,!Ḅ⍝#ា%&'(Ḅ⍝#)*
ᑣ4c-ᦪ/.19.234V4X(1-2)2+V8.20.<=>?40m2⚓
ᐳ14⚓

2(x—3(x—2)>421.22.UVWABCᙠ)☢[ᙶ᪗^_Ḅ`a᝞bᡠR
dWABCᔣf)g3hᓫ`j-kᑮW4B1G
W&B1Goᔣp)g6hᓫ`j-kᑮ44282c2.(b_qhr=stjᙳ/1hᓫ`j-).(1)ᙠb_vS)gwḄW&B1Gxy44z2c2{(2)[|ᑏS42c2ᔜ⚔Ḅᙶ᪗.23.᝞b
AB//CD,AE)ᑖ஽BAD,CZ)AEF,/.CFE=4y4£.ADC=DCE.ᡂpᑡ
KᙠPᳮᵫ4:4•AB஻UV),•••^BAE=CFE().•:4E)ᑖ4840(),••Z-BAE—Z.:.Z.CFE=ADAE().•CFE=E,••Z.DAE=4£().____஻______).:./LADC=DCE().

3DA24.ᙠᨴ¡_
¢᪥¤ᜓ¦§ᢇ©᜜ᱥ./¬©᜜ᱥ®¯¢°Ḅ◤,¢᪥±“ᡃᨬµ᰿Ḅ©᜜ᱥ”¸ᦻ¢ஹ»¼ஹ½¾&ᐸÀÁhÂÃÄ*ÅÆ᪵ÈÉ(q`¯¢Ê⌱Â)
᝞b᪷ÍÈÉÎÏᑴḄÑÒE᦮ḄÔ2b.ÕÖ᪷ÍÔ2b×ØḄÙÚ
<ÛpᑡÜ⚪4(1)ÞÈÉ_
¸ᩩàÔ2b&ᡧàÔ2bâãSµ᰿“ᦻ¢”ᨵ70æ
ᓰÈÉèæᦪḄ35%,ᑣᐳÈÉÅ믢{(2)¢᪥2ᑜ¦§©᜜ᱥ6000í
Õ᪷Í᪵ÞᦪÍ
î2¢᪥¦§½¾Âᱥïðíñòᔠᳮô(3)ᩩàÔ2b_rஹ஻Ḅõ.25.᝞b
öV1=40°,42=2/1.(1)ᑖÃS2ஹNFEDḄ-ᦪ{(2)úNBOE=120°
44c=41{(3)ÕÖAüᩩýþAG,¬kAG஻EF,K஺EḄÿ
G,ᑨ“DCஹN4ED“2GḄᦪᐵᵨᳮᵫ.4⚓ᐳ14⚓

426.$%&“'(”*+⁚-./012(34ᦻ678ᵬஹ:;ᡠ1᪥ᐳ92>(ᐸ/ᵬ᪥>ᦪA:᪥>ᦪBᵬ᪥>ᦪC90>)EᜓᙠH(IJKᔆMN8OJKP☢RSJKᔆTOḄJKḄUVWMNJKḄᝅᦪ1#45ᝅ45#90ᝅ91ᝅYZ[\ᝅJKḄUV(ᐗ/ᝅ)605040᝞`;ᡠ1᪥ᑖbᓫdMNJK(ᐳef5000ᐗ.(1)᝞`ᵬஹ:;᪥ὶᔠMNJKᐳiZ⁚jAklm(2)ᵬஹ:;ᡠ1᪥ᔜᨵAk1pEᜓqr8Om(3)᝞`ᵬ᪥ᨵ10sH1tᦑv8Owx$;ᡠ1᪥yz({ᨬḕlḄMNJK~ᫀ.

5ᫀ᪆1.ூᫀ௃Aூ᪆௃WᵫḄឋᱯi⌱⚗A/Ḅᔠ⚪ᦑ⌱WA.᪷Ḅឋᱯᑨᓽi.⚪ὃḄឋᳮḄឋRᑨḄ.2.ூᫀ௃Dூ᪆௃WA⌱⚗¢£¤ὑ>¦ᜧB¨ᨵ©ᜧª⌕¬ᐰ☢ᦑ〉ᔠ¯B⌱⚗¢£¤ὑ>¦ᜧB¨ᨵ©ᜧª⌕¬ᐰ☢ᦑ〉ᔠ¯C⌱⚗ᐹᨵẚ²ឋ〉ᔠᐰ☢¯஺⌱⚗〉ᔠᐰ☢¯ᦑ⌱WD.᪷ᐰ☢Ḅᱯ´µᑨᓽi.⚪ὃ¶ᐰ☢Ḅeᵨ⚪ᐵ·R¸¹ᐰ☢Ḅᱯºᐹᨵẚ²ឋḄ〉ᔠᵨᐰ☢.3.ூᫀ௃Bூ᪆௃W(2,—3)ᑮx¼Ḅ½¾$|(3|=3,ᦑ⌱WB.᪷ᑮx¼Ḅ½¾$Àᙶ᪗ḄÃÄÅᓽiÆOÇ`.⚪ὃᙶ᪗ᑮᙶ᪗¼Ḅ½¾ᑮx¼Ḅ½¾$Àᙶ᪗ḄÃÄÅᑮy¼Ḅ½¾$Èᙶ᪗ḄÃÄÅÉR᧕┯ᦪÇᔠR⚪Ḅᐵ·.4.ூᫀ௃Dூ᪆௃Wᵫi,Z.AOC+Z.AOD=180°.Z.AOD=180°-:4OC=140°.ᦑ⌱WD.᪷Ì⊡ÎḄÏÐÑÒ⚪.⚪Ó⌕ὃÌ⊡ÎÔÕ¸¹Ì⊡ÎḄÏÐRÑ⚪Ḅᐵ·.5.ூᫀ௃Aூ᪆௃W¯Z:R~Ö2x—ay=5Ḅ(×2x2—a=5,6⚓ᐳ14⚓

6a=-1ᦑ⌱WA.ᑭᵨÙᐗ(µ~ÖḄḄÐᓽi.⚪Ó⌕ὃ¶Ùᐗ(µ~ÖḄᑭᵨÙᐗ(µ~ÖḄḄÐR⚪Ḅᐵ·.6.ூᫀ௃Dூ᪆௃W•••:4=4BEF,AD//EF.ᦑ⌱WD.᪷HÛÎÜÝ;Þ
ᓽiß.⚪Ó⌕ὃ¶
ḄᑨÏÔÕ¸¹HÛÎÜÝ;Þ
R⚪Ḅᐵ·.7.ூᫀ௃Dூ᪆௃WSàáᕒãäᡂæḄ´RWᚖ
èᨬé¯ᦑ⌱WD.ᑭᵨᚖ
èᨬéß.⚪ὃ¶ᚖ
èWêÞ
᜜(ì(ᩩÞ
Ḅᚖ
ÉᚖCîïḄ
èðñᚖ
è.ᚖ
èḄឋWᚖ
èᨬé.8.ூᫀ௃Aூ᪆௃W&•--V81=-9,Ù4⌱⚗¯V16=4,B⌱⚗ḄÇò¯vV27=3,"#3,ÙC⌱⚗ḄÇò¯•••óô=|(2|=2,Ù஺⌱⚗ḄÇò¯ᦑ⌱:A.ᑭᵨ÷ø~᪷Ḅឋù~᪷Ḅឋ´µᑖ᪆ᓽi.⚪ὃ¶÷ø~᪷Ḅឋù~᪷Ḅឋ⚪ᐵ·Rᱞû÷ø~᪷Ḅឋù~᪷Ḅឋ.9.ூᫀ௃B

7ூ᪆௃WA,v0’ᦑCᔠ⚪Dஹx

8DE//GF,:.zl=z3=22°,•}2644MNḄf᜜,:.42=43+Z71=32°+90°=122°,ᦑ⌱B.᪷⚪+bOE஻GF,ᑭᵨ'Ḅឋ"c43ḄᦪᯠᑭᵨKḄ᜜&'()ᓽ+,-.⚪ὃ01'Ḅឋ"2345'Ḅឋ"6,⚪Ḅᐵ8.12.ூ-ᫀ௃Dூ,᪆௃,ᵫ⚪b@A8CZ6sR62,Pfᕜ◤⌕82022+8ᖪ252¡6,_£ᑮ஺ᜐᦑᙶ᪗U¨1,3,ᦑ⌱D.ᑭᵨ©Spª«¬ᨬḄ©®¯,.⚪ὃ01ᙶ᪗°vḄᐵr_ᔠ©Spª«6,⚪Ḅᐵ8.13.ூ-ᫀ௃±9ூ,᪆௃,•.•¨±92=81,•••81ḄR᪷6±9.ᦑ-ᫀU²9³´᪷R᪷Ḅµ¶·¸ᓽ+.⚪ὃ01R᪷Ḅµ¶.¹fsᦪᨵIR᪷»¼½U¾¿ᦪ0ḄR᪷60;ÁᦪÂᨵR᪷.14.ூ-ᫀ௃ᎷÄ⚪ூ,᪆௃,᝞va1b,b1c,È6a஻c.bᡠÊËÄ⚪6ᎷÄ⚪__ᦑ-ᫀUᎷÄ⚪.᪷ᩩÍÎcvᓽ+Ï⍝ËÄ⚪UᎷÄ⚪ÑÒfÄ⚪6ᎷÄ⚪Ó◤⌕f¿ÔÕ+Ê1.C_____1⚪ὃ01Ä⚪'°ᚖ³Ḅឋ"×cv6,⚪1Ḅᐵ8.15.ூ-ᫀ௃400

9ூ,᪆௃,⚪ὃ0ḄØo6ÙÚÛÜÝÞßàᵨdᦪÜÎáḄâãᦑ[ä6ÙÚÛÜÝÞßàᵨdᦪÜÎáḄâãä6ÙÚÛåÜÝÞßàᵨdᦪÜÎáḄâã:᪵6ᡠnçḄ400èÜÝÞßàᵨdᦪÜÎáḄâãᦑ᪵é^6400.ᦑ-ᫀU400.[ä6ᢣὃ0ḄØoḄᐰää6[äìḄåfὃ0ḄØo᪵6[äìᡠnçḄfíᑖä᪵é^ᑣ6ᢣ᪵ìäḄᦪðᡃ¼ᙠóᑖ[äஹäஹ᪵ஹ᪵é^ô@ᭆöâ✌ᐜpcὃ0ḄØopc[äஹä¯᪷ùᦈûᦪḄôfíᑖØopc᪵ᨬ¯᪷᪵tµc᪵é^.,⚪⌕ᑖüᐹäm⚪ìḄ[äஹä°᪵ᐵ86Òtὃ0ḄØo.[äஹä°᪵Ḅὃ0Øo6¾þḄᡠþḄ6Ḅᜧ᪵᪵ᒹḄḄᦪᓫ.16.ூᫀ௃?!4#ᫀ$%&ூ'᪆௃'!ᐜ*ᑡ%,-.᝞-1+2=1,-1-2=-3ᯠ6ᵨx,&9ᣚ;☄!=>ᳮ@;!4ᦑᫀC!ᫀ$%&.ᡠEFG,Ḅ'ᢣḄIᦪJKLFG,ḄM%FG.ᙠO'PQᐜ*:21ᑡ%,-.ᯠ6ᵨx,y9ᣚᓽ@ᑡ>ḄFG,.U⚪WX⚪⌕Z[ᳮ'FG,Ḅ'Ḅ\]*'ᑡ>Ḅ-.ᓽ@ᑡ>ḄFG,.17.ூᫀ௃-ூ'᪆௃'!V%-3+|y-1|=0,V%-3>0,|y-1|>0,•••x-3=0,y—1=0.x=3,y=1•••M#3,l&,••.iᙠj%k▲ᦑᫀC!%.ᐜᑭᵨnoᦪḄp]q\xryḄJstuvḄᙶ᪗ᑨzvᙠᙶ᪗{ᑁḄ}.⚪ὃ-F᪷rJḄnoឋ᪷uvḄᙶ᪗ᑨzvᡠᙠḄk▲'⚪ᐵj10⚓ᐳ14⚓

10OXryḄJ.18.ூᫀ௃150°ூ'᪆௃'!᝞!88D஻AE,•••BD//AE,4=130஺•••ABD=ZJ1=130°,•••AABC=160",DBC=Z.ABC-4ABD=160°-130°=30°,•••CF//AE,&.BD//CF,4c=180°-DBC=150°,ᦑᫀC:150°.B8D஻AE,ᵨឋᩩ@;4BD=44=130஺BD//CF,s᪷u>ᑁ⊡@ONCḄ¢ᦪ.⚪£⌕ὃḄឋ᪀⌼ា§Ḅ¨©'⚪Ḅᐵ.19.ூᫀ௃'!V4x(l-2)2+V8=2x(-1)2+2=2x1+2=2+2=4.ூ'᪆௃ᐜᓄ«ᔜ.ᯠ6s®-ᓽ@'.⚪ὃ¯ᦪḄ-°q±²ᙢᓄ«ᔜ.'⚪Ḅᐵ.20.ூᫀ௃'!´µ%ᔆ·,2x+3y=2ঝᵫজ-ঝ;!-4y=8,:.y=—2»y=—29ᐭজ;2%+2=10,,%=4,••.FG,Ḅ'C4

11ூ'᪆௃ᑭᵨ½¾¿ᐗÁᐜ¿ÂX,s'%ᐗ%ÄFGᓽ@.⚪ὃ'ᐗ%ÄFG,'⚪ᐵÅƽ¾¿ᐗÁ.21.ூᫀ௃'!'Ç.È-3(%-2)24,;!x-7,xᑣÇ.,Ḅ'ÍC%7F^Aorூ'᪆௃ᑖÖOM%Ç.Ḅ'Í᪷u×Ø!>ᜧÙᜧஹ>ÙஹᜧᜧÛÜஹᜧᜧÝ'q\Ç.,Ḅ'Í.⚪ὃḄ'%ᐗ%ÄÇ.,ÞqOM%Ç.'ÍßẠ±“>ᜧÙᜧâ>ÙâᜧᜧÛÜâᜧᜧÜᑮ”Ḅåᑣ'U⚪Ḅᐵ.22.ூᫀ௃'!প᝞,ç&B1Qr282c2ᓽCᡠO.(2)ᵫ@;24(1,—2),B(—2,—4),C(—l,—1).222ூ'᪆௃(1)᪷uíḄឋᓽ@.(2)îᔠk@;ᫀ.⚪ὃ-íðᣚ±²ÅÆíḄឋ'⚪Ḅᐵ.23.ூᫀ௃>ñÇD4EÇ9ᣚÇ9ᣚAOᑁ┯ñÇ,ᑁ┯ñÇூ'᪆௃÷ø!()••.NB4E=/CFE(>ñÇ)ý•••4EᑖN84D()•••Z-BAE=Z.DAE,:.CFE=N04E(Ç9ᣚ)ý/.CFE—Z.F,j12⚓ᐳ14⚓

12/.DAE=4E(Ç9ᣚ).•.4D஻BE(ᑁ┯ñÇ).•.4DC=4DCE(ᑁ┯ñÇ)ᦑᫀC!>ñÇââDAE-,Ç9ᣚâÇ9ᣚâAD-.ᑁ┯ñÇâᑁ┯ñÇ.ᑭᵨḄᑨ\rឋᑖ᪆ÿᳮ.⚪ὃḄᑨឋᳮḄᑨឋ⚪ᐵ.24.ூᫀ௃200ூ᪆௃:(1)70+35%=200(),ᡠᐳ!"200$%ᦑᫀ'(200)(2)6000X30%=1800(*)(+,%᪥./0123ᱥ1800*56ᔠᳮ)(3)vn=200x30%=60,•••m=200-60-70-30=40,•••m=40,n=60.(1)ᑭᵨ:᰿''ᦻ%”ᨵ70@ᓰ!B@ᦪḄ35%,ᓽEF((2)ᐜᑭᵨᡧIJKᑮ:᰿0123ᱥḄ@ᦪᓰ5MN6000ᓽE)(3)ᐜFO”ḄPMᑭᵨB@ᦪQRᐸT@ᦪᓽEKᑮ⚪ὃ"ᩩIV,JWᡧIV,JXᵨ᪵+,BZ⚪ᐵ[\]^ᡧIV,JWᩩIV,J_`aᐵbc.25.ூᫀ௃(1)(•••41=40஺,42=241,•••42=2x40°=80°,•••FED=180°-Zl-Z2=60°)(2)fg:vZ.BDE=120",LFED=60°,•••BDE+FED=180°,•••EF//BC,••Z.C=z.1)(3)(hJ᝞j(

13-AG//EF,•Z.GAE=zl,••EF//BC,•FED=EDC,vZ.AED=41+FED,••Z-AED=Z.GAE+EDC.ூ᪆௃(1)᪷s⚪tXuḄvFᓽE)(2)xᔠ(1)yOEF஻BC,᪷sḄឋᳮᓽEK)(3)᪷s⚪thOJI᪷sḄឋXuḄFᓽE.⚪ὃ"ḄឋḄឋᳮ⚪Ḅᐵ.26.ூᫀ௃((1)ᵫ⚪tK5000-40X92=5000-1680=1320(ᐗ)(ᵬஹ᪥ὶᔠ./ᐳE⁚1320ᐗ)(2)ᵬஹᡠ%᪥ᔜᨵxஹy%ᜓOᑣ᪷s⚪tKl50x+60y=5000'K¡¢ᘤ(ᵬ᪥ᵫ52@᪥ᨵ40@)(3)ᵫ⚪tK᪥ὶᔠ./82ᝅ◤⌕Ḅ§ᵨ'(50x82=4100,᪥ὶᔠ./91ᝅ◤⌕Ḅ§ᵨ'(40x91=3640,•••3640<4100.¢./91ᝅ5/82ᝅªḕ¬.ூ᪆௃(1)᪷sᔆḄ├¯°±FOὶᔠ./◤⌕Ḅ§ᵨᵫᓫ³./ᐳḄ§ᵨQRὶᔠ./◤⌕Ḅ§ᵨ´EFOxµ)(2)ᵬஹᡠ%᪥ᔜᨵxஹy%ᜓO᪷sB@ᦪᓫ³./ḄB§ᵨ¶·¢ᐗ¸¹º»FOᐸᓽE)(3)ᐜFO᪥ὶᔠ./82ᝅḄ§ᵨMFOὶᔠ./91ᝅḄ§ᵨ56ᜧ½´EKOxµ.⚪ὃ"ᓫ°xᦪ¾=B°Ḅ¿ᵨᑡ¢ᐗ¸¹ºÁ▭Ã⚪Ḅ¿ᵨ¹ᫀ,Ḅ¿ᵨÄ᪷sᩩŶ·¢ᐗ¸¹º»Fᐵ.Æ14⚓ᐳ14⚓