1、 ( 3 30 ) 1. A.2cm 3cm 4cm B.1cm 4cm 2cm C.1cm 2cm 3cm D.6cm 2cm 3cm 2. . A.3 B 2 C.1 D.0 3. 50 A. 50 B. 50 65 C 80 D 65 4. 1 AD=AC BD=BC O AB . A. 1 B. 2 C.3 D.4 1 5. 2 AD D 3 A C F E B E F AD AD 4 N M D C B A BF CE CE BF ABD ACD BF CE BDF CDE A 1 B 2 C 3 D 4 6. ( 1 N P O M A C B ) 2013 2012 1) 201
2、4 ( ) A 5 y x o 1 2 3 1 2 3 -1 -1 -2 -2 -3 A B CB 8 A B C D EC 3 2D 2 37. 3 O ABC O A=40 BOC= A. 0 110 B. 0 120 C. 0 130 D. 0 140 C O A B 3 4 N M D C B A 1 N P O M A C B D 3 A C F E B 8. 1 AD AE = = =100 =70 BD CE ADB AEC BAE A. ABE ACD B. ABD ACE C. DAE=40 D. C=30 9 2 BC B C AC A C A CA B CB AB A B
3、 A 1 B 2 C 3 D 4 10. 3 BC BD CBD A 60 B 75 C 90 D 95 3 24 11. 4x 2 16y 2=_, (2x+y) 2 2(2x+y)+1=_. 12. x 2 y 2xy 2 2xy 13. 3cm 6cm _cm. 14. 36 0 . 15. 1 OC AOB PM=7cm AOB= PN= . 16. 3 ABC FED AD=FC AB=FE ABC FED.( ) A E C 3 B A E D 5 y x o 1 2 3 1 2 3 -1 -1 -2 -2 -3 A B C 17. 4, AB=AC, AB=10 DC=3 AB
4、MN AC D DBC= AD= . 18. P AOB P OA OB P1 P2 P1P2 OA M OB N P1P2=15 PMN 20 23 8 9 61 19. 5 A(1, 2) B(3, 1) C( 2, 1). 1 ABC y 1 1 1 A B C . 2 1 1 1 A B C . 3 1 1 1 A B C _ 20. x=-2 y= 1 221. 7 D E F C (1) (2) (1) 7 F E B D A C 8 A B C D E A D E F B C 22. 8 ABC ACB=90 CE BE BC AC , E AD CE D. 1 DC CEB. 2 , 5cm AD cm DE 3 BE . 23. ABC AB=AC D AC BD=BC=AD ABC 24. ABC D D EF/BC AB E AC F BE+CF=EF 25. ABC BE CF AC AB BE BD=AC CF CG=AB AD AG ADG
