[計量] PP3計量問題
題目的圖是是一個正方形裡面有個圓
A circular flower bed lies in a square graden plot that is 60 meters on each
side. What fraction of the garden plot area is not part of the flower bed?
我的理解是 只要小於 pi/4的都有可能是flower bed的大小
可是答案是 (4-pi)/4 看不懂為什麼@@
麻煩高手解答一下QQ
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