https://www.facebook.com/kiron.lin/media_set?set=a.1479710565593186.1073741844.100006627693181&type=1#!/photo.php?fbid=1479710635593179&set=a.1479710565593186.1073741844.100006627693181&type=3&theater
如上圖
國二數學
有解答
急呀!國二數學三角形數學高手快幫我!
2014-04-26 12:50 am
回答 (11)
2014-04-26 1:15 am
✔ 最佳答案
SolBC中點E
DE為中垂線
BD=CD
△ACD周長
=AC+CD+AD
=AC+BD+AD
=AC+AB
=8+12
=20
(D)
2014-05-30 4:45 pm
2014-05-28 5:15 pm
2014-05-27 1:43 pm
2014-05-24 2:39 pm
2014-05-08 2:49 pm
2014-05-04 4:11 pm
2014-04-30 9:22 pm
2014-04-28 2:46 pm
2014-04-28 5:46 am
2014-04-26 1:18 am
先po照再詳解
https://docs.google.com/file/d/0B66P1dpXwBETcXBPMWJoRW8xRE0/edit
2014-04-25 19:14:24 補充：
___
連DC
得DC=DB
其中△ACD周長
___ ___ ___
=AC+CD+DA
___ ___
已知DC=DB
___ ___ ___
=AC+BD+DA
___ ___
=AC+BA
=8+12
https://docs.google.com/file/d/0B66P1dpXwBETcXBPMWJoRW8xRE0/edit
2014-04-25 19:14:24 補充：
___
連DC
得DC=DB
其中△ACD周長
___ ___ ___
=AC+CD+DA
___ ___
已知DC=DB
___ ___ ___
=AC+BD+DA
___ ___
=AC+BA
=8+12
收錄日期: 2021-04-30 18:46:37
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20140425000010KK06240