Maths 矩形maths

2008-07-29 5:56 am

有積木50件,把它排成一個直排是橫排2倍的矩形, 它的橫排有幾行?

Please 列出answer, 算式 and 解釋. Please!!!!!!!!!!!!!!!!!!!!
Please!!!!!!!!!!!!!!!!!!!!

更新1:

Quickly!

更新2:

Please

更新3:

But The Answer Is (開方50)/2=5 .Why?Why? Tell Me Why? The 算式 Is (開方50)/2........ Please

回答 (3)

2008-07-29 6:06 am

✔ 最佳答案

令積木長寬各為x
x*2x=50
x=5
矩形=5*10
橫排為5行直排為10行!

2008-07-28 22:07:15 補充：
畫圖試試看
妳就知!^^ 加油!

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2008-07-29 6:05 am

設橫排是y,即直排是2y
y * 2y = 50
2y^2=50
y^2=25
y=5
所以,橫排是5
註(y^2 是 y的2方)

希望幫到你^^

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2008-07-29 5:57 am

Please quickly!!!!!!!!!!!!!!!!!!1

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