8.64 ୋ 8
30. ɓࡈҖ̬ٙࡈᓃٙѬᅺ݊ A(-4 , 0)�B(0 , 6)�C(6 , 0) ʿ
D(0 , -9)�
(a) ίɓٜԉѬᅺ̻ࠦɪᖭҖ ABCD�
(b) ӋҖ ABCD ٙࠦጐ�
31. (a) ίɓٜԉѬᅺ̻ࠦɪ�ᖭɓࡈ˸ P(2 , 2)�Q(0 , 2)�
R(-1 , 0)�S(-3 , -2)�T(5 , -2) ʿ U(3 , 0) މᓃٙ
ʬᗙҖ PQRSTU�
(b) ӋʬᗙҖ PQRSTU ٙࠦጐ�
32. ڝྡהͪމҖ OEFG�H ݊ EF ၾ y ൿٙʹᓃ�
(a) ᄳ̈ H ٙѬᅺ�
(b) Ӌ EF ձ OH ٙڗܓ�
(c) ߰Җ OEFG ٙࠦጐ݊ 25 ̻˙ఊЗ�Ӌ x ٙ࠽�
33. ڝྡהͪމ̻Б̬ᗙҖ PQRS�Չʕ PS ձ QR ே݊˥̻ᇞ�̴
ٙࠦጐ݊ 144 ̻˙ఊЗʿ QR = 12 ఊЗ�
(a) Ӌ R ٙѬᅺ�
(b) Ӌ a ٙ࠽�
(c) ͟Ϥ�Ӌ P ٙѬᅺ�
34. ίྡʕ�J(4a - 4 , -a)�K(48 , 0)�L(31 , 0)�M(3a + 3 , 3a + 3)
ʿ N(17 , 0) ݊ʬᗙҖ OJKLMN ٙᓃ�OJKLMN ٙࠦጐ݊
336 ̻˙ఊЗ�
(a) Ӌ a ٙ࠽�
(b) MJ ݊щདۧᇞ�༊༆ᙑЫٙഈࣩ�
35. A(4 , -3) ձ B(-7 , -3) ʱйᔎࡡᓃ O Աනࣛ০˙Σૅᔷ 270cЇ
Alձ Bl�
(a) Ӌ Al ձ Bl ٙѬᅺ�
(b) AB = AlBl ݊щ͍ᆽ�༊༆ᙑЫٙഈࣩ�
y
x
O G(x ,0)
F(4,- 5)
E(-3,-5) H
y
x
O
S(9,a)
Q(-6,-3)
P
R
y
x
O
N KL
M
J
解釋題
解釋題
3
3
3
3
3
4
18 ̻˙ఊЗ
75 ̻˙ఊЗ
(0 , -5)
(6 , -3)
7
Al(3 , 4)�Bl(3 , -7)
3
(-3 , 9)
EF = 7 ఊЗ�OH = 5 ఊЗ
9
݊
݊