NETMAN数学JJ的NO19的质疑

寂寞的自由 · 发表于 2004-1-19 13:50:00

19. In xy-panel, (-1,2) and (3,-1) is the two points of the diagnose of a square, what is the perimeter of the square?(must be a square, I remember it clearly, but…)
My answer: 14
自由的答案：10倍的根号2

谢谢大家

sunhx · 发表于 2004-1-19 14:38:00

10倍的根号2

Snazzy · 发表于 2004-1-19 15:32:00

d'accord

binneal · 发表于 2004-1-19 15:44:00

If you want to save sometime on this question, feel free to read my posting at

http://forum.chasedream.com/dispbbs.asp?boardID=22&ID=34308

It is lengthy and in English, but you can search for netman in it.

cyc1226 · 发表于 2004-1-20 01:04:00

請問10根號2怎求出來的

in xy-panel, (-1,2) and (3,-1) is the two points of the diagnose of a square
不是指說此兩點連成的線是正方形的對角線嗎也就是5 而另兩邊為3,4
所以周長為2x(3+4)=14 ?

cyc1226 · 发表于 2004-1-20 01:29:00

阿我錯了題目說那是要一個正方形所以是 1:根號2=S:5 所以S=5/2根號2

then 4S=4x5/2根號2=10根號2

所以希望明天考試不要這麼糊塗

NETMAN数学JJ的NO19的质疑

NETMAN数学JJ的NO19的质疑

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