ΌഃʿЧ�ɚ�9.39
13. A ձ B ݊ɓ࿁Όഃ̬ᗙҖ�̬ᗙҖ A ٙՉʕɧૢᗙٙڗܓʱй
݊ 2 cm�3 cm ձ 4 cm�Ͼ̬ᗙҖ B ٙՉʕՇૢᗙٙڗܓʱй
݊ 3 cm ձ 5 cm�Ӌ̬ᗙҖ B ٙմޢ�
14. ਞڝྡ�̬ᗙҖ ABCD ձ EFGH ϞӚϞ̙ঐ݊ΌഃྡҖ�
A D
C
B
E H
F G
20°
120°
85°
15. ਞڝྡ�̬߰ᗙҖ ABCD ձ PQRS ٙմޢே݊ 22 cm�̴ࡁϞ
ӚϞ̙ঐ݊ΌഃྡҖ�
B C
D
A 5 cm
8 cm
6 cm
Q R
S
P
16. (a) P ձ Q ݊ΌഃྡҖ�߰ P ٙմޢ݊ 30 cm�Ӌ Q ٙմޢ�
(b) ʊٝڗ˙Җ R ձڗ˙Җ S ٙմޢே݊ 30 cm�खሬႩމ
ڗ˙Җ R ձڗ˙Җ S ֛̀Όഃ�Ы݊щΝจ�༊༆ᙑЫٙ
ഈࣩ�
17. ༊Ҫ̛ྡʕ͍ٙ˙Җʱϓ
(a) ՇࡈΌഃٙڗ˙Җ�
(b) ̬ࡈΌഃ͍ٙ˙Җ�
ܓ三
18. ༊ҪྡҖ X ʱ௲ϓ̬ࡈၾྡҖ Y ΌഃٙྡҖ�
➥ Է 15
解釋題
ྡҖ X ྡҖ Y