http://i8.photobucket.com/albums/a25/cla_yu/qu.jpg
In the figure, AB // DC. If the areas of ∆ABE and ∆CDE are 25 and 16 respectively.
Find the area of ∆ABC.
a. 34
b. 36
c. 41
ⓓ.45
please explain the answer....
f.4 mathematics
2008-01-26 11:09 pm
回答 (1)
2008-01-26 11:30 pm
✔ 最佳答案
圖片參考：http://i8.photobucket.com/albums/a25/cla_yu/qu.jpg
In the figure, AB // DC. If the areas of ∆ABE and ∆CDE are 25 and 16 respectively.
Find the area of ∆ABC.
a. 34
b. 36
c. 41
ⓓ.45
∆ABE ~ ∆CDE
AE/EC=5/4
AE/AC=5/9
∆ABC和 ∆AEC同高
故∆ABC的面質=(9/5)*25=45
答案是D
2008-01-26 15:31:09 補充：
∆ABC和 ∆AEB同高
收錄日期: 2021-04-26 13:04:02
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080126000051KK01776