As follows:
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maths~~~~!
2010-03-02 7:20 am
回答 (4)
2010-03-03 3:08 am
✔ 最佳答案
已知 △ABC =~= △XYZ,得 XZ = AC = AM + MC = 6 (全等△對應邊相等), 即 MC = 6 - AM
又ㄥABC = ㄥXYZ (全等△對應角相等),ㄥMCB = ㄥMCB(公共角)
得△YMC ~ △ABC(A.A.)
於是由相似△對應邊成比例得
MC / AC = MY / AB
(6 - AM) / 6 = 3/5
5(6 - AM) = 18
AM = 12/5 = 2.4
2010-03-02 9:04 pm
AC=XZ=6
MY/AB=MC/XZ
3/5=MC/6
5MC=18
MC=3.6
so, AM= 6-3.6
=2.4
===
MY/AB=MC/XZ
3/5=MC/6
5MC=18
MC=3.6
so, AM= 6-3.6
=2.4
===
2010-03-02 8:55 am
∵△ABC ≡ △XYZ
∴AC = XZ = 6
∵△ABC ~ △ MYC
∴CM / CA = MY / AB ( 3 sides proportion )
CM / 6 = 3 / 5
∴ CM = 18/5
AM = CA - CM = 6 - 18/5 = 12/5
∴AC = XZ = 6
∵△ABC ~ △ MYC
∴CM / CA = MY / AB ( 3 sides proportion )
CM / 6 = 3 / 5
∴ CM = 18/5
AM = CA - CM = 6 - 18/5 = 12/5
參考: me
收錄日期: 2021-04-21 22:09:35
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20100301000051KK02008