1、 2017-2018 3 36 1 ( ) A B 90 C D 2 ( ) A 1 2 3 B 1 1.5 3 C 3 4 8 D 4 5 6 3 1 2 3 ( ) A B C D 4 13 cm 3 cm ( ) A 7 cm B 3 cm C 7 cm 3 cm D 8 cm 5 CD CE CF ABC ( ) A AB 2BF B ACE 1 2 ACB C AE BE D CD BE 5 6 ABC B C ABC ABC ( ) A A B B C C D B C 7 ABC EFD AB EF CE 3.5 CD 3 AC ( ) A 3 B 3.5 C 6.5 D 5 7
2、8 ABC B C ABC ABC 12 ( ) A A B B C C D B C 9 1 2 AE OB E BD OA D AE BD C ( ) A 2 B 3 C 4 D 5 9 10 ( ) 11 5 6 ( ) A 11 B 16 C 17 D 16 17 12 ABC ACB BE ABC ED AB D. A AE 6 cm CE ( ) 12 A. 3 cm B 2 cm C 3 cm D 4 cm 3 18 13 _ 13 14 _ _ ( ) 15 AD BC O AB CD B D AOB COD _( ) 15 16 ABC AB 12 AC 8 AD BC AD
3、_ 16 17 ABC D E AB BC BDE DE B AC F G. ADF 8 DEG _ 17 18 A AC 10 B AC AB D _ 18 66 19 10 BD AC EF AC D F 1 2. ADG C. BD AC EF AC( ) 19 3 4 ) BD EF( ) 2 CBD( ) 1 2( ) 1 CBD( ) GD BC( ) ADG C( ) 20 12 AD ABC BE ABD (1) ABE BAD BED (2) BED BD F. 20 (3) ABC 40 BD 5 BDE BD 21 (8 ) ABD FEC B C D E AB FE BC DE B E. ADB FCE. ( 21 ) 22 10 ABC ACB D AC E BC CE CD AE BD. (1) ACE BCD (2) CAE BDE ( 22 ) 23 8 AD BAC DE AB E DF AC F BD CD. BE CF. ( 23 ) 24 8 AC DC DC A D C B(BC AC) A ADB AD 60 m DC ( 24 ) 25 10 Rt ABC ACB AC BC D ABC AD BD DE AC CA E DE AE BC. ( 25 )
