條問題求下列有色圖形的周界:(兀=3.14)
個圖係長方形(長10 cm,闊12 cm),最頂係冇線(或虛線),上面空左個半圓形既形狀
ask primary's maths(一條)
2007-01-05 4:07 am
回答 (3)
2007-01-05 4:15 am
✔ 最佳答案
上面空左個半圓形的周界:= ( 10cm x 3.14 ) / 2
= 31.4cm / 2
= 15.7cm
整個圖形的周界:
= 10cm + 12cm +12cm + 15.7cm
= 49.7cm
參考: 自己計,希望可以幫到你!!
2007-01-05 4:19 am
perimeter of a rectangle = (length + width) X 2
= (10+12) X 2
= 44cm
circumference of a circle = 2兀 r
= 2 x 3.14 x 5
= 31.4cm
total perimeter = 44 + 31.4 - 10
= 65.4cm
done : )
= (10+12) X 2
= 44cm
circumference of a circle = 2兀 r
= 2 x 3.14 x 5
= 31.4cm
total perimeter = 44 + 31.4 - 10
= 65.4cm
done : )
參考: me
收錄日期: 2021-04-29 17:22:06
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070104000051KK03680