2021-2022学年湖北省武汉市汉阳区八年级（上）质检数学试卷（10月份）（附答案详解）

《2021-2022学年湖北省武汉市汉阳区八年级（上）质检数学试卷（10月份）（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。

2021-2022
ᓅḕ□ᨒ
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BAE+Z.DAF=Z.BAD-Z,EAF=4EAF,Z.EAF=Z-GAFfᙠ{G4Fv16⚓ᐳ20⚓

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17VDE.CEᑖÐ"஽1DC/BCDḄZᑖL•••CDE+DCE=112.5°,•••NE=67.5°(3)4BA஺5NBOQḄZᑖLÏE,•••Z.EAO=^BAO,EOQ=BOQ,•••"=EOQ-A.EAO=(NBOQ-NB40)=2BO,vAE.AFᑖÐ"஽BA஺Z/MGḄZᑖLZ.EAF=90°.ᙠÈAEFv••ᨵF"ÖFḄ3×ᦑᨵO@Z.EAF=3ZE,Z.E=30°,/.ABO=60°@Z.EAF=34F,E=60஺AABO=120°ঞ"=3zE,Z.E=22.5",4ABO=45°টNE=3NF,3E=67.5°,ABO=135".N4B஺Ã60஺ᡈ45஺.ூE᪆௃(1)᪷¤LMN5¤LPQᚖ¤Ï஺7V4஺8=90஺¯ᵫAEஹBEᑖÖIJ"NB40V48஺ḄZᑖL%+NB4E=)஺48,Z.ABE=^ABO,ᵫhᑁiᳮᓽ%+;¹(2)AOஹBCÏ9F᪷¤LMN5¤LP஺ᚖ¤Ï஺%+V4OB=90஺ª%+/OAB+NOBZ=90°,ᦑNP4B+/MB4=270஺¯ᵫA஺ஹ3cᑖÐ"NBAPV4BMḄZᑖL7NBA஺=^4BAP,ᵫhᑁiᳮ7NF=45",¯᪷DEஹCEᑖÐ"ZADC48CDḄZᑖL7“DE+DCE=112.5°,ª%+;¹(3))ᵫNB405NBOQḄZᑖLÏE■7NE4஺=1zBA஺Z.EOQ=^Z.BOQ,ª%+”ḄÚᦪᵫAEஹAFᑖÐ"V84஺V஺4GḄZᑖL7"4F=90஺ᙠ4AEFvᵫF"ÖFḄ3×ᑖÛÜÝÞª}ᑖßà¹./⚪ὃ4Ḅ"hᑁiᳮá7hᑁ"180஺"E-:⚪Ḅᐵq.24.ூ-ᫀ௃EO(1)44஺8"Ὺ¤hᳮᵫ᝞äOOy/2a+b+6+(a—b+12)2=0,•.2a+b+6=0,a—b+12=0,a=—6,b=6,,•94(-6,6),vAB1%å,,./B=BO=6,Z,ABO=90°,18⚓ᐳ20⚓

18•{4B஺"Ὺ¤h(2)᝞³2,æ9஺çDH10B”,³2Z.DHO=CBO=90°,ABCO+4BOC=/.DOH+Z.COB,;.4DOH=4BCO,è•CO=DO,ADHO=ZCBO=90஺•••ABCOWAHOD(AAS),•••DH=BO,BC=OH,•••9C"ABḄv9AC=BC=3,/.OH=3,BH=BO—OH=3,vAB=DH,Z,AEB=Z.DEH,4ABE=NDHE=90°,•^ABE^^DHEQAAS),•••BE=EH=2;.OE=OH+EH=2•••9E(F2,())(3)OM+MN-ONḄéÉÊᳮᵫ᝞äOæ9Aç4P_LM஺P,4(21êå஺AG_14MÏyåG,•••AP=AQ=6,Z.PAQ=90°=Z.MAG,••Z.PAM=Z-GAQ,*;NPM=AQG=90°,•••{APMgZMQGQ4s4),AM=AG,MP=QG,

19V/.MAN=45°,AMAN=GAN=45°,*,;AN=AN,ANGOSAS'),MN=GN,OM+MN-ON=OP+MP+GN-ON=6+MP+ON+OG-ON=6+QG+OG=6+6=12.ூE᪆௃(1)ᵫëìឋ*a=-6,b=6,*9Aᙶ᪗ᓽ*E(2)æ9஺çDH1஺8ᵫ“AAS”ABCOï{HOD,%CH=BO,BC=0H,ᵫ“AAS”AABEð{OHE,%BE=£1"=[,ᓽ*E(3)æ94ç4PlM஺P,4