9.38 ୋ 9
8. ਞڝྡ�ʊ̬ٝᗙҖ ABCD ٙմޢ݊ 29�༆ᙑމО̬
ᗙҖ ABCD ձ PQRS ӚϞ̙ঐ݊ΌഃྡҖ�
7
6 8
B
C
D
A
9
Q
R
S
P
9. ਞڝྡ�ʊٝʞᗙҖ ABCDE ٙʫԉձ݊ 540c�༆ᙑމОʞᗙ
Җ ABCDE ձ PQRST ӚϞ̙ঐ݊ΌഃྡҖ�
113° 117°
120°
A
B E
DC
P
Q T
SR
ܓ二
Ӌɨΐ࿁ΌഃྡҖʕٙ͊ٝඎ�[ୋ 10-11 ᕚ]
10. ABCD , SRQP
A D
B Q R
C
P S
x y
z
78°
74°
8 cm
9 cm
11. ABCDE , QPTSR
B C
D
S
Q R
E T
P
A
y
x z
28°
32°
7 cm
6 cm
12. ʊٝ PQRS ձ WXYZ ே̬݊ᗙҖ�˲ PQRS , WXYZ�
+P = 95c�+R = 100c�YZ = 7 cm ձ PS # QR�
(a) Ӌ +Q� (b) Ӌ +Y� (c) Ӌ RS�
➥ Է 14