ʱ : һ (试卷合集)河北?019届九年级数学期中考试?6份试卷含word合集答案 - 百度文库ϿʼĶ
A. B. C. D. ⣨ÿС3֣18֣
29. (?3)?
10. һĿڴУװɸɫͬͬڴװ3 ĸΪôڴܸΪ 11.֪
ֵΪ
AĶ
12.A
13.䷽ⷽx2?8x?3ʱ̵ͬʱһʵ ʹ÷ һȫƽʽ
14. ͼڡABCУAB=5AC=4DڱABϣ ACD=BADijΪ
⣨10С⣬78֣ 1510֣㣺1
?3?1???1?3?1?24???
?2???0 218?2sin45?|?2|
2216.15֣̣ⷽ12x?3x?02x?10x?25?03x2?3x?1
17.5֣֪ǹxĶκmֵ
18.5֣еΪ2345ƣ泯ϴȣȻȡţ ϵ֮ΪżĸǶ٣б״ͼ
19.5֣ͼij̵ӪҵԶABбΪ31㣬AB Ϊ12ף ֮ľBCijȷ0.1ף
οݣ sin31=0.515cos31=0.857tan31=0.60
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2
20.6֣֪xһԪηx+x+m2m=0һʵΪ1m ̵ֵһʵ
21.6֣ͼ1=2B=DAB=DE=5BC=4 1֤ABCסADE
2ADij
22.8֣ˮŰÿ2Ԫļ۸ijˮɽȻÿ4Ԫļ ۣÿ۳100ͨ鷢֣ˮÿۼÿ0.1Ԫÿ ɶ۳20Ϊ֤ÿ۳260Űۣ̾
1ˮÿۼ۽xԪÿ úxĴ ʽʾ
2ˮҪÿӯ300ԪŰ轫ÿۼ۽ͶԪ 23.8֣ȫȵֱصֱlϣͼ1AB=6cmBC=8cm ABC=90㣬RtABCֱlƽƣͼ2ʾ 1֤ıACFDƽıΣ
2ƶRtABCʹıACFDΪΣ 3RtABCƽ4cmıDHCF
24.10֣ͼƽıABCDƽֱϵУAD=6OAOBij ǹxһԪηx7x+12=0OAOB 1cosABCֵ 2EΪxϵĵ㣬SAOE= Ƿƣ˵ɣ
E꣬жϡAOEDAO
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꼶ѧѧп
һ
ѡ⣨ÿС3֣24֣
1.A 2.C 3.D 4.C 5.A 6.B 7.B 8.B. ⣨ÿС3֣18֣ 9.3 10.15 11.⣨78֣
15(1)1?26 232
116 12.30 13.16 14 3516 1x1=0,x2=-1.5 2x1=x2=5 3x?2
3?13 217. ⣺߽m=13 m10m1 m=3
ǹxĶκm+2m1=2
18. ⣺״ͼͼ
12кΪż4֣ P֮Ϊż=
=
19. ⣺BƽĴ߶BCΪC RtABCУߡACB=90㣬
BC=AB?sinBAC=120.5156.2ף ֮ľBCijԼΪ6.2ף 20⣺跽̵һΪx2 1+x2=1 x2=0
x=1x+x+m2m=0
1+1+m2m=0mm2=0 m1=0m2=2
mֵ02̵һʵ0 21. 1֤ߡ1=2 BAC=DAE
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2
2
2
ߡB=D
ABCסADEAA
2⣺ߡABCסADE
AB=DE=5BC=4 AD=
20=100+200x
22. ⣺1ˮÿۼ۽xԪÿ100+
2ã42x100+200x=300 ãx=x=1
x=ʱ100+200=200260 x=1ʱ100+200=300 ÿ۳260 x=1
Ű轫ÿۼ۽1Ԫ
23. 1֤ıACFDΪRtABCƽγɵģ ADCFACDFıACFDΪƽıΣ
2⣺ҪʹıACFDΪΣʹAD=ACɣ RtABCУAB=6cmBC=8cmABC=90㣬 ݹɶAC=
=10cm
ʽRtABCƽ10cmʹıACFDΪΣ
3⣺RtABCƽ4cmBE=4cm BHΪRtDEFλߣ HΪDFе㣬 ʡHFBΪ6cm
ıDHCFΪSABCSHBF=246=18cm
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