123
20172018
1. 150 120
2.
3.
3 36
1 ABCDEF AC=DFBC=EF ABCDEF
A.A=D B. ACB=F C. B=DEF D. ACB=D
2 ABCAB=AC DAC BD=BC=ADA
A.30 B.36 C.45 D.70
3 ABCAEFABAEBE
ACAF FABEABEFBC EABFAC
A.1 B.2 C.3 D.4
4 52
A7 B 9 C 12 9 D 12
5 40
A40 B 50 C 60 D 70
6 .
A. B. C. D.
7ABCAB = ACBD ABCAC DBDC = 75
A 35 B 40 C 70 D 110
