9.32 ୋ 9
(b) ɨΐ࿁ྡҖʔՈ௪�࿁Ꮠᗙഃ�ٙሯ�̴ࡁԨʔΌഃ�
(i) (ii)
3 3 4 4
7 6
5
2
A D P S
C
Q R
B
E
2
1 1
1 1
F I H
G
P
2.5
1 1
1 1
Q T
R S
AD ၾ PQRS ᗙேʔഃ� EF = PQ�FG = QR�EI = PT ձ IH = TS�
Ш GH ! RS�
ਞڝྡ�ʊ̬ٝᗙҖ PQRS ٙմޢ݊ 20�༆ᙑ
މО̬ᗙҖ ABCD ձ PQRS ӚϞ̙ঐ݊ΌഃྡҖ�
6
D
A B C 4
5
7 S
P Q R
ί PQRS ʕ�
PQ + QR + RS + SP = 20
PQ + 4 + 5 + 7 = 20
PQ = 4
a AB = 6
` AB ၾ PQRS ᗙேʔഃ�
` ABCD ձ PQRS ӚϞ̙ঐ݊ΌഃྡҖ�
ܓ一
例例 14
解
ABCD ձ PQRS ʔՈ௪�࿁Ꮠ
ᗙഃ�ٙሯ�
◀
ਞڝྡ�ʊ̬ٝᗙҖ ABCD ٙմޢ݊ 16�༆ᙑމО̬ᗙҖ
ABCD ձ EFGH ӚϞ̙ঐ݊ΌഃྡҖ�
2
3
6
A
D
C
B
4
E
H
G
F
14
即時訓練即時訓練
➥ ୦ᕚ 9C 8