請幫幫忙
A round swimming pool their fence is 157 m long. Find the swinning pool area ?
請幫忙計算列式(最緊要列式)
2008-05-15 6:40 pm
回答 (3)
2008-05-15 6:52 pm
✔ 最佳答案
周界=2*半徑(r)*3.14=157mr=25m
面積=r*r*3.14
=25*25*3.14
=1962.5m^2
2008-05-16 6:31 pm
157/3.14=50---求左個直徑先...
50/2=25---求返個半徑...
25*25*3.14=1962.5---求圓形面積既公式...
1962.5is the area of the swinning pool....
2008-05-16 10:34:46 補充：
sorry...唔記得寫單位...
50/2=25---求返個半徑...
25*25*3.14=1962.5---求圓形面積既公式...
1962.5is the area of the swinning pool....
2008-05-16 10:34:46 補充：
sorry...唔記得寫單位...
參考: me
2008-05-15 6:47 pm
(157 / 3.14 /2)(157 / 3.14 /2)*3.14
先抓出直徑.之後用半徑斗自剩*3.14
先抓出直徑.之後用半徑斗自剩*3.14
收錄日期: 2021-04-23 17:54:39
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080515000051KK00578