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這題題目的答案應該給錯了...

Sep 7th 2013, 12:27

其實我剛才的確說得比較抽象 ^_^"

一維即是線性，只有一個方向考慮，例如數線，只是一條直路，只有前進或後退，此乃一維。

二維可以理解為面積，你回想學習座標幾何，每一點可用(x,y)交代，二元就是二維，除左右，還有上下。

三維空間則是體積，數學上可以考慮用 (x,y,z)座標，經常說的3D就是指三維, three dimensional。

我的意思是，舉例你以顏色闊筆跟以下的程序畫圓：

　　　　　　　　　　　　　　　心－－紅紅紅－－－黃黃黃－－邊

以上的直線以［心］為圓心，整條線旋轉一周以畫出一個圓。
你看到（或想到）黃色畫出的面積會比紅色畫出的面積為大。

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