n
ETHING YA
3. 如右圖,△ABC 中,已知 DE // FG //
VES),
BC,DG // FC,回答下列問題:
(1) DE = 5 FG = 7 DG = 6
9
9
FC = ?(3分)
SE
sc
(V) 30 (B) 31
ortin. 54
Fi
20
(2) 若AD = 6, BF =,則DF = ?(2分)
3
HVb: bB = 3:1
【解】
NE VB VC
AD OF 5 7² 2 0 Ma
(9) NÕ' : Ö'Ō' = 1:
20
3
ti @ tri
@ tri D
LE
CF
SHERSHEY
BU O'E NÕ°C (²) T
38.2V
-20×8
1/
30
6 LON BC
可惜
r-40-09-03
B
F
20
03-00
FI 0 0 0
3 Y
OF 62 k
A
7
E
G
x
Ō0 Ak ² (r-re
