人教版数学九年级下册 27.2.1 相似三角形的判定 同步练习(包含答案) - 百度文库 ر

˽̰ѧ꼶² 27.2.1 εж ͬϰ𰸣

˽̰ѧ꼶² 27.2.1 εж ͬϰ𰸣

һѡ⣨7⣻14֣

1.ͼĸѡһǣ

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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