問一題數學題
2008-02-23 9:41 pm
回答 (2)
2008-02-23 11:09 pm
✔ 最佳答案
AD = DB (given)DE//BC (given)
so AE = CE (intercept theroem)
2x = 6.6
x = 3.3
2008-02-23 15:10:02 補充：
樓上果個的答案令人摸不着頭腦= =
2008-02-23 9:55 pm
lf AD is n
AB：AD=2ｎ：１ｎ
AB：AD=2：１
DE：BC=6：3
DE：BC=2：1
ABC/ (：) ADE=2/ (：) 1
6.6/X=2/1
X=6.6/2
X=3.3
AB：AD=2ｎ：１ｎ
AB：AD=2：１
DE：BC=6：3
DE：BC=2：1
ABC/ (：) ADE=2/ (：) 1
6.6/X=2/1
X=6.6/2
X=3.3
收錄日期: 2021-04-13 15:11:58
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080223000051KK01821