1、 2017-2018 1 A AAS B SAS C AAS D ASA 2 A B C D 3 D E BC ABE ACD AB AC BAE CAD BE CD AD DE A 1 B 2 C 3 D 4 4 AC BD O OA OD SAS AOB DOC A AB DC B OB OC C A D D AOB DOC 5 ABC DEF AB DE A D ABC DEF A B E B C F C BC EF D AC DF 6 Rt ABC BC DEF A ABC DEF B DEF 90 0C AC DF D EC CF 7 a b c A a b B b c C a b
2、D 1 2 8 ABC ABC ACB ACD P A 80 0 P A 40 0B 50 0C 60 0D 70 0 5 6 30 9 ABC C 90 0 AD BAC BC 10cm BD 6cm D AB 10 ABC C 90 0 AC BC AD BAC BC D DE AB E AB 10cm DEB 10 5 50 11 AB CD AC DB A D 12 B C 90 0 M BC DM ADC AM DAB 17 ABC 90 0 AB=BC D AC C A BD E F EF CE AF 18 ABC AD BAC C 2 B AB=AC+CD AB AE AC DE 19 ADF BCE A B D E F C AD BC DE CF BE AF
