2021-2022学年北京市怀柔七年级（下）期末数学试卷（附答案详解）

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2021-2022
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ᵨᡝᦪ"13vᐗᡠᓰḄᑖᓽ.B⚪ὃEF⚣ᦪᑖ⊤<⚣ᦪᑖ1>H⚣ᦪஹ⚣ᦪஹᦪᦪḄᐵf⚪ḄᐵR.24.ூcᫀUCBEh1J2¡N1=NCBE¡¢£ᣚDE஻BCᑁ┯2¡h1Jூf᪆௃§¨L--BE//FG,.•42=NCBEh1J2¡.Zl=Z2,zl=NCBE¡¢£ᣚ.•.DE//BCᑁ┯2¡h1J.ᦑcᫀªL(CBE)h1J2¡N1=NCBE¡¢£ᣚOE஻BCᑁ┯2¡h1J.᪷JḄᑨ[¬ឋ®¯°fᓽ±cᫀ.B⚪²⌕ὃEFJḄᑨ[¬ឋ®³´]ᵨJḄᑨ[¬ឋ®¯°ffµB⚪ḄᐵR.25.ூcᫀ௃45஺-7·16⚓ᐳ19⚓

16ூf᪆௃fL(1)H4᝞Hᡠ»;•Z.BAC=90°—a,4PJᑖNB4C,11•ZTAP=-Z.CAB=45°--a.22ᦑcᫀªL45஺.La.ঝ¾¿LZ.PNB=24APN.ᳮᵫLvPN//AC,.(APN=Z.PAC,•••P4Jᑖ/B4C,•(PAC=NPAB,(PAN=4NPA,•:(PNB=LNPA+(PAN,•Z,PNB=2/.APN.(1)᪷⌕°G±H4ᓽ(2)জᑭᵨ324ᑁ2<[ᳮ2JᑖḄ[ðfᓽঝ¾¿L(PNB=2N4PN.ᑭᵨ324Ḅ᜜2Ḅឋ®§¨ᓽ.B⚪ὃEGH-ÅᩖGHᚖJḄឋ®2JᑖḄ[áÈÉf⚪ḄᐵRᳮf⚪ÊᮣÌÍᵨᡠÎÈÉfµÏ⚪.26.ூcᫀ௃(>5)ூf᪆௃fL(1)ᓄÑ>ÒÓÔÕ▣4תL(Ø5)(2)᪷Õ▣4×ᑮ>Òuª:(ax—5y=-31-4%+by=-3'Ù:ÚÛᐭÜÝ>Ò,CL—5=-3-4+b=—3

17f:{£:I(1)᪷⚪ÊáḄ[ÃÙ>ÒuâᣚªLᢥ᯿[Ãᓽᑏ±Õ▣(2)᪷Õ▣4×ᑏᡂ>ÒuḄ4×Ù⚪åæÈḄf£ᐭ>Òufᦪ஺ஹb.B⚪çᐗ._>Òu°f⚪f⚪ᐵRᙠ=Zᳮf⚪Êé?@.27.ூcᫀ௃(3,2)PiP-618⚓ᐳ19⚓

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