˽̰ѧ꼶² 27.2.1 εж ͬϰ𰸣
˽̰ѧ꼶² 27.2.1 εж ͬϰ𰸣
һѡ⣨7⣻14֣
1.ͼĸѡһǣ
A. CODסAOB B. AOCסBOD C. DCAסBAC D. PCAסPBD 2.ͼڡABCУPΪABһ㣬ĸ
١ACP=B ڡAPC=ACBAC2=APABABCP=APCBAPC͡ACBƵ ( )
A. ٢ڢ B. ٢ۢ C. ڢۢ D. ٢ڢ 3.ͼʾ6Σ١ABCڡBCDۡBDEܡBFGݡFGHޡEFK.ТڡƵ( )
A. ڢۢ B. ۢܢ C. ܢݢ D. ڢۢ 4.¸ͼõСεıֱ߳ͬСεĶΪ㻭ΣABCƵͼΪ
A. B. C.
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D.
˽̰ѧ꼶² 27.2.1 εж ͬϰ𰸣
5.УжϡABCABCƵǣ
A. A=45㣬C=26㣬A=45㣬B=109 B. AB=1AC= BC=2AB=6AC=9BC=12 C. AB=1.5AC=
A=36㣬AB=2.1AC=1.5A=36 D. AB=2BC=1C=90㣬AB=
BC= B=90
6.ͼABCУAB=4BC=6DEֱDZABBCϵ㣬ABCDEµġBDEԭβƵǣ
A. BDE=C B. DEAC C. AD=3BE=2 D. AD=1CE=4 7.жADBסABCǣ
A. ABD=ACB B. ADB=ABC C. AB2=AD?AC D. = ⣨4⣻5֣
8.ͼʾEƽıABCDıBCӳһ㣬AECDڵFBFдͼһΣ________
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˽̰ѧ꼶² 27.2.1 εж ͬϰ𰸣
9.ͼڡABCУABACDEֱΪABACϵĵ㣮AC=3ADAB=3AEFΪBCһ㣬һ________ʹáFDBADEƣֻдһ
10.ͼڱ߳Ϊ1еPABCͼγɵУƵ
________.
11.ͼ
1AEAB=________ABCסAEF 2E=________ABCסAEF ⣨9⣻55֣
12.һεֱ߳Ϊ12cm8cm7cmһεֱ߳Ϊ16cm24cm14cmΪʲô
13.ͼRtABCУACB=90㣬CDABΪDEΪBCһ㣬AEEFAEABF
1֤AGCסEFB
21ΣͼлУǶд
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˽̰ѧ꼶² 27.2.1 εж ͬϰ𰸣
14.ͼABC͡DEFĶ㶼ڱ߳Ϊ1СεĶϡABC͡DEFΪʲô
15.֪ͼڡABCУDEֱΪABACϵĵ㣬AD= AEDEAC=3AB=5֤ADEסACB
16.ͼڡABCУDEֱABACϣAD=5DB=7AE=6EC=4 ֤ADEסACB
17.ͼʾDڡABCABϣAD=2BD=4AC=2 ֤ACDסABC
18.ͼABCDУEΪBCе㣬FDCϵĵ㣬DF=3FC˵
ABEסECF
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