close
標題:
一條中2數學題~{關於圓形}
發問:
一條長1m的彩帶可圍繞一個圓形禮盒兩個圈。該禮盒的直徑是多少? 點計,列埋條式比我呀,唔該晒!
最佳解答:
此文章來自奇摩知識+如有不便請留言告知
gift box's circumference: 0.5m circumference = 2TTr (TT=3.1416) (r=radius) 2TTr = 0.5m r= 0.5m/(2x3.1416) r=0.5m/6.28 r=0.0796m diameter= 0.159 m
其他解答:
The circumference of the box = 1m / 2 = 0.5 m Let x be the diameter of the box. 2xπ = 0.5 x = 0.159 (to 3 sig. fig.) ∴ the diameter of the box is 0.159m.|||||2πr=0.5m 6.28r=0.5m 0.5m r= ------ 6.28 r=0.0796 0.0796x2=0.159 直徑=0.159|||||設直徑為d。 2dπ=1 d=1/(2π) d≒0.159 2008-06-19 22:21:37 補充: ∴設直徑是0.159m
文章標籤
全站熱搜