8.60 ୋ 8
5. ίྡʕ�ɓ৳ሄˬ A ᓃ̈೯� B�C ʿ D ɧᓃՑ༺ E ᓃ�
ӋሄˬمБٙ༩ࢰٙᐼڗܓ�
6. ڝྡהͪމɓٜԉѬᅺ̻ࠦ�Չʕ FG ݊˥̻ᇞ�HG ݊དۧᇞ�
(a) Ӌ G ٙѬᅺ�
(b) ʊٝ FH = 41 ఊЗ�Ӌ 3FGH ٙմޢ�
7. ίྡʕ�OPQR ݊ڗ˙Җ�˲ PO = 2
1 RO�
(a) Ӌ RO ٙڗܓ�
(b) Q ձ R ٙѬᅺ݊ޟჿ�
8. ڝྡהͪމڗ˙Җ ABCD�̴̬ٙૢᗙே݊˥̻ᇞאདۧᇞ�
ABCD ٙմޢ݊ 90 ఊЗ�Ӌ
(a) ᇞݬ BA ձ AD ٙڗܓ�
(b) C ձ D ٙѬᅺ�
9. Ӌྡʕ̻Б̬ᗙҖ FGHJ ٙࠦጐ�
y
x
O
E(4,- 6)
D(4,4)
C(- 6,4)
B(- 6,- 2) A(- 2,- 2)
y
x
O H(30,- 1)
F(- 10,- 10) G
y
x
Q P(0,4)
R
O
A(9,12)
B(-6,12)
C D
y
x
O
y
x
O
F(0.2,0.6)
J(0.4,0.6)
H(-0.2,-0.2)
G(-0.4,-0.2)
2
2
2
2
3
30 ఊЗ
(30 , -10)
8 ఊЗ
BA = 15 ఊЗ�AD = 30 ఊЗ
90 ఊЗ
Q(-8 , 4)�R(-8 , 0)
C(-6 , -18)�D(9 , -18)
0.16 ̻˙ఊЗ