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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


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