1、 2017 150 100 8 3 24 1 A 1 B 2 C 3 D 4 2 13 cm 3 cm A 3 cm 5 cm B 3 cm 7 cm C 3 cm D 5 cm 3 : ; ; ; ; ; , A.5 B.3 C.4 D.6 4. A,D,C,F AB=DE,BC=EF, ABC DEF A. BCA= F B. B= E C.BC EF D. A= EDF 5 6 5 ABCD AC BD E ( ) A AB AD B AC BCD C AB BD D BEC DEC 6 ABC AD BC D BD=CD BC=5 AD=4 A 5 B 10 C 15 D 20 7.
2、A. B. C. D. 8. A B C D E F 4 A B C D E 9 10 11 A B C D 10 3 30 9 10 _ 11 6 8 _ 12. OAD OBC OA=2 OC=6 BD= 13 a b A a C b BAC AB=AC 2 12 13 14 15 14 ABC ADE B BAC AED 15 1 2 ABE ACE 16. ABC DE BC AB+AC=8cm ACE . D C B A 16 17 18 17. ABC ( ) ABC _ ( ABC) 18 ACB 90 C CAB CBA D 3 AC 4 BC E F D B C A AB=5
3、, D AB _ 10 96 19 8 A B C ABC l ABC l C B AD C B A20 10 ABCD BD AC BAD AB AD 21 10 AD BC A B BC AD E BE C CF BE F AB=FC 22 10 ABC AB=AC AC AB AC D E. 1 A=40 DCB 2 AE=5 DCB 16 ABC 23 (10 ) ABCD AD BC AC O O AC AD BC E F AF AE=AF 24.(10 ) ABC AD BAC BC D DE AB DF AC BD = DC F E D C B A 19 20 21 22 24
4、23 EB = FC 25. 10 ABC AB 1 l BC D AC 2 l BC E 1 l 2 l O ADE 6cm 1 BC 2 OA OB OC OBC 16cm OA 26(A) 14 ABCD AD BC E CD AE BE BE AE AE BC F 1 FC=AD 2 AB=BC+AD 26(B) 14 ABC AD BC EF AC AC F BC E BD= DE 1 BAE=40 C 2 ABC 14 cm AC=6 cm DC 27(A). 14 A E F C AE=CF E F DE AC B F AC AB=CD 1 2 BD EF G 3 ABF AF GA 2 26 A 25 26 B 27(B.) 14 ABC DEC AC=BC DC=EC ACB= ECD=90 1 1 A C D AF BD; 2 2 A C D AF BD 3 3 2 CF CF AD G AFG AFG G F E D C B A A B C D E F F E D C B A图 1 图 2 图 3 27 A 27 B
