已知三角DEF~KML,DE=3,EF=7,KM=9,LK=33。求ML和FD

2007-04-13 6:49 am
中一MATHS

回答 (2)

2007-04-13 6:55 am
✔ 最佳答案
ΔDEF~ΔKML
ML / EF = KM / DE ( 相似Δ對應邊 )
ML / 7 = 9 / 3
ML / 7 = 3
ML = 21
FD / LK = DE / KM ( 相似Δ對應邊 )
FD / 33 = 3 / 9
9( FD ) = 3( 33 )
9( FD ) = 99
FD = 11 //


2007-04-12 23:09:54 補充:
我畫了一個圖, 你會更易明白http://i178.photobucket.com/albums/w276/calligraphy-yahoo2006/ScreenHunter_02Apr-2.jpg
參考: me~
2007-04-13 7:08 am
KM/DE=ML/EF
9/3=ML/7
ML=21

DE/KM=FD/LK
3/9=FD/33
FD=1/99

2007-04-12 23:10:47 補充:
睇黎我真係答得好差~同上面個位比-差天動地
參考: ME


收錄日期: 2021-05-02 12:32:02
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070412000051KK06654

檢視 Wayback Machine 備份