ʱ : ڶ 广东省广州天河区七校联?019-2020学年七上数学《精?0份合集》期中模拟试?- 百度文库ϿʼĶ
2019-2020ѧѧģԾ
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1. ǰȽԼ֤дȷճڿϢճ 2ѡʹ2BǦͿѡʹ0.5ɫּǩֱд幤ʼ
3밴˳ڸĿĴ𣬳дĴЧڲݸֽϴЧ
4ֿ࣬Ҫ۵ҪŪơŪ壬ʹͿҺֽ
һѡ⣺12С⣬ÿСĸѡУֻһȷģȷѡͿڴӦλϣÿС3֣ѡѡѡĴ𰸳һ0 1ķͼԳͼεĸ
A1 B2 C3 D4
2ľֱΪ5cm7cmҪѡľ䶤Σľijǣ A2cm B4cm C12cm D17cm
3иֱεǣ A111513 B145 C81517
D456
֪ʶһ
4ͼʾϵαīȾһ֣ܿѧȫһΣôȫһǣ ASSS BSAS CAAS DASA
5ͼʾһô8ףһ3£ĶڵϣʱĶĵײУ A4
B3.5 C5
D13.6
״۶ף
6ͼֱl1l2l3ʾĹ·Ҫһ·ľȣɹѡĵַУ Aһ B C DĴ
7εΪ10ױ߳Ϊ12ױϵĸΪ A6
B7
C8
D9
תվҪ
8ͼPM=PNMQΪPMNĽƽߣMQN=72㣬PĶ
A18 B36 C48 D60
9ͼ֪CFֱƽABڵEACD=70㣬AĶǣ A25 B35 C40 D45
10ͼһֱεֽƬֱDZAC=6cmBC=8cmֽʹBAغϣۺΪDEBEijΪ A4 cm B5 cm C6 cm D10 cm
11ͼʾһԲ8cm뾶Ϊ2cmһֻϴӵABе·̣ȡ3ǣ A20cm B10cm C14cm Dȷ
12һľͼʾ֪AB=4BC=3DC=12AD=13B=90㣬ľΪ A60
B30 C24 D12
ʳҪABC
⣺5С⣬20ֻ֣ҪдÿСԵ4֣
13סͬʱͬһص8km6kmʱ km 14εһ80㣬ô 15ͼ֪1=2ԡSASΪݣʹABCաBADҪ
16ͼеıζΣеζֱΣзεı߳Ϊ9cmABCD֮Ϊ cm
17ڵȱߡABCУEACߵе㣬AD=6ADһMʹCM+MEֵСCM+MEСֵ
⣺7С⣬64֣ҪдҪ˵㲽裮
186֣߹ͼУ·OAOBڽ·ڸ
֤
2
CDѧУﰲװһյ·ƣҪλPԶҵ·ľҲһԶλͼ̣ͼۼ
198֣ͼʾAC=AE1=2AB=AD֤BC=DE
һPд
209֣ͼBFCEһֱϣA=DBF=CEDF㷢ABDEʲôϵ˵ɣ
219֣ͼ֪PǡAOBƽһ㣬PCOAPDΪCD
1PCD=PDCΪʲô 2OPCDĴֱƽΪʲô
AC
OB
22.(10) ͼ۵ֽƬһADʹDBCϵĵF֪BC=10cm,AB=8cm,ECij
2310μ䣬Сʦĵǰ棬Сĵǽ֮䣬ͼ 1֤ADCաCEB2ǰĿ̶ȿ֪AC=25cmǽשĺaĴСÿשĺȣ
2412֣ڡABCУBAC=90㣬AB=AClǹAһֱߣDCEAEE֤
1ֱlƵAתͼ1λʱ˵DE=BD+CE 2ֱlƵAתͼ2λʱ˵DE=BDCE
3ֱlƵAתͼ3λʱʣBDDECEĵϵд֤
BDAEС