網主的話
好開心呀! 終於完成靚仔田亮的homepage,雖然製作略為簡單,沒有太多花巧野,但內容絕充實兼有用。以後呢欄將會係我發表自己意見及感想的地方,如果大家有咩意見,歡迎 send e-mail 俾我。
4/10/2000 19:24
To 小曹子:
7. triangle MNC ~ DNA
BC=AD
BC:MC = 2:1
SO AD:MC=2:1
DN:NM=2;1
AN:NC=2:1
Let the area of triangle NCD ba a and the area of ABMN be a
because DN: NM=2:1
area of NCD = 2 x Area of MNC ( they ahve the same height)
area of MNC=a/2
2 x area of triangle MCD = area of ABC ( BC=2MC& same height)
2 x (a/2+a) = b+a/2
3a = b+a/2
5a/2 = b
5a = 2b
so a:b =2:5
請我食飯呀!
5/10/2000 16:37
好開心呀! 最近收到很多田亮fan send mail 俾我,好多謝你們
14/10/2000 11:15