(自行決定取π=3.14或22/7)
1.圖形小荼几面的圓周是1.76m。它的半俓是多少cm?
2.一個圓形泳池的直俓是10.4米。它的圓周是多少米?
數學問題呀!!{急了}
2007-05-24 7:44 pm
回答 (9)
2007-05-24 7:52 pm
✔ 最佳答案
第一題:1.76÷3.14÷2
=1.76/3.14÷2
=44/157
第二題:
10.14x3.14
=31.8396
好好珍惜
做左好耐
參考: 我
2007-05-24 8:04 pm
圆周＝π x 直径
或
圆周＝2 π x 半径
(记住2半径=直径，两条方程式都可用)
1。 1.76=2 x π x(半径)
半径=1.76/(2π)
=0.2803m
=28.03cm
2. 圆周=π x 10.4
=32.656 米
或
圆周＝2 π x 半径
(记住2半径=直径，两条方程式都可用)
1。 1.76=2 x π x(半径)
半径=1.76/(2π)
=0.2803m
=28.03cm
2. 圆周=π x 10.4
=32.656 米
2007-05-24 8:00 pm
1. 2TT r = 1.76
2.2TT 5.2 =圓周
半徑=25.88..cm
(TT = 3.4)
圓周=35.36 m
===========================
唔知岩唔岩嫁..希望岩啦
2.2TT 5.2 =圓周
半徑=25.88..cm
(TT = 3.4)
圓周=35.36 m
===========================
唔知岩唔岩嫁..希望岩啦
參考: 自己
2007-05-24 7:58 pm
1)
它的半俓 = 1.76m ÷ 22/7 ÷ 2 = 0.28 m
(22/7 = π)
(you need to ÷ 2 because you want 半俓 not 直徑)
2)
它的圓周 = 10.4 米 × 3.14 = 32.656 米
(c = d × π or 2 × r × π)
它的半俓 = 1.76m ÷ 22/7 ÷ 2 = 0.28 m
(22/7 = π)
(you need to ÷ 2 because you want 半俓 not 直徑)
2)
它的圓周 = 10.4 米 × 3.14 = 32.656 米
(c = d × π or 2 × r × π)
參考: I did it in two minutes!
2007-05-24 7:57 pm
答1:
1.76×100÷3.14÷2(人地1.76係m，答案要求答cm，所以要先乘100)
=176÷3.14÷2
=28.0254...
=28.03(cm)(取小數後兩位)
答2：
10.4×3.14
=32.656(米)
1.76×100÷3.14÷2(人地1.76係m，答案要求答cm，所以要先乘100)
=176÷3.14÷2
=28.0254...
=28.03(cm)(取小數後兩位)
答2：
10.4×3.14
=32.656(米)
2007-05-24 7:53 pm
1)
2 π r =1.76m
r=(1.76/2π)m
take π=22/7,
r=0.28m
2)
circumference =2 π r
=π (10.4m)
take π=3.14,
circumference =32.656m
2 π r =1.76m
r=(1.76/2π)m
take π=22/7,
r=0.28m
2)
circumference =2 π r
=π (10.4m)
take π=3.14,
circumference =32.656m
2007-05-24 7:53 pm
圓周=直徑 x π
1) 1.76/π/2
=0.28cm
2) 10.4 X π
=32.7m
1) 1.76/π/2
=0.28cm
2) 10.4 X π
=32.7m
2007-05-24 7:51 pm
1. 2 π r = 1.76
then solve r
r =1.76 /2π
2. 圓周=2 π r
= 2 * 3.16*10.4/2 (p.s r = 10.4/2 )
= 自己用calculator 可以計埋~~!!
then solve r
r =1.76 /2π
2. 圓周=2 π r
= 2 * 3.16*10.4/2 (p.s r = 10.4/2 )
= 自己用calculator 可以計埋~~!!
收錄日期: 2021-04-13 00:31:40
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070524000051KK01405