2022-2023学年河南省郑州市郑东新区某学校八年级（上）开学数学试卷（附答案详解）

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2022-2023
ᓭḕ᜜᪥
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1A.120°B.130°C.140°D.150°10.§q¨+3Ḅ()A.ᙠ5f6©ªB.ᙠ6f7©ªC.ᙠ7f8©ªD.ᙠ8f9©ª11.«¬ᜧ®M-3&-2V3.12.}~RA(2,y)PRB(x,-3)ᐵ²xQS³ᑣxy=.13.}~Oᦪa,6µ¶(a-2)2+b+6=0,¸¹(ᓃ=a)Ḅ`[᪷,.14.᝞v+[»Ḅ¼☢*+ᑖ½$2c,"f4c/H,À$5cm.{=b⇪⇩ÃÄRÅÆÇ4HÈ☢ÉÊ=ᙌᑮÌ஺Rᑣ⇪⇩ÉÊḄᨬÎÏÐ+$_cm.15.᝞vᨵ=ᙽ%&'&(ᱏÒ%&*4c=6cm,BC=8cm.Ó%&*ACḼ%AOᢚÖ×ØÙᙠÚ*ABaPAEÜᔠᑣC£ßḄ+$cm.16.(1)(1-2V2)2U712XV6.-V24'(3)(V27-V48)xV3U(4)(l+2x)3-g=lU(5)2712+3V48U(6)5+2817.}~x-1ḄZ[᪷,±3,2x+y+7Ḅ`[᪷,2,â7-x-yḄZ[᪷.18.᝞vᨵ=ãäᙊæÀ$12cm,¼☢ᕜ+$15cm,ᙠᙊæᑁḄ¼☢Aᜐᨵ=b≆≈,Øìf¼☢BᜐḄeíîᔠᑣïb≆≈ÆÇḄᨬÎðñ,òócm?(õö3)

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7•••ZC=30°,=90°-ZC=60°.•••N1=4A+Z.ADE,•••LADE=60".•••Z.ABF=AADE=60°,4FBG=90°-4ABF=30°.••BF/flr4஺/2•••BF//I,2Z.BGH+/.FBG=180°,ABGH=180°-FBG=150°,Z2=4BGH=150°.ᦑ⌱(D.m8oBF஻iØACràᑭᵨ1z{Ḅ᜜zḄឋRÑḄឋᳮÇÅ⚔zHxḄឋᓽf.⚪ã⌕ὃFz1z{ḄÁ%┦zåæRÑḄឋᳮ1z{Ḅ᜜zḄឋÅ⚔zHxm8oBF஻ᓃØACrè!⚪Ḅᐵ$.10.ூᫀ௃Cூ᪆௃(•.•42=16,52=25,ᡠ4éêé5,ᡠë+3ᙠ7ᑮ8ìí.ᦑ⌱(C.ᐜîïëḄ᦮ᦪðᑖᯠᓽfᑨÒë+3Ḅñòµ.⚪ã⌕ὃîP.óôõö÷ø◤⌕îPîP!ᡃûᐹᜓḄᦪþEv“ᜳ
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8(2)+EDᦪFGHᜧḄIJ5.12.ூᫀ௃6ூ᪆௃,:L2(2,y)MLB(x,-3)ᐵByOGP•••x=-2,y=-3,•••xy=6,ᦑᫀ(6.᪷0ᐵByOGPLḄᙶ᪗ᱯLTᙶ᪗U(VIᦪWᙶ᪗XY7ZᑮxஹyḄH]J^_ᫀ.8⚪:⌕ὃ=>ᐵB)OGPLḄᙶ᪗ᱯLᐵ`abLḄYᓄde.13.ூᫀ௃-2ூ᪆௃ᵫ⚪g7ha—2=0,6+6=0,■■a=2,b=—6,b—a=-6—2=-8,•••8Ḅj᪷2.ᦑᫀ(-2.᪷0kDᦪḄឋmᓽ7n_aMbḄHᯠpqᐭb-aᓽ7n_ᫀ.s⚪ὃ=j᪷Ḅtu⚪Ḅᐵ`vwxᵨj᪷Ḅtus⚪yBzẠ⚪|.14.ூᫀ௃13ூ᪆௃᝞~,•••PQ=13.ᦑᫀ(13.⌕n+LḄᨬᨬḄᯠpᑭᵨ+Lᨬ.s⚪:⌕ὃ=+Lᨬ᝞*j~ᓄᡂ-☢~.

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