chairgun汉化手机版:一个圆的周长,直径,和半径的和是9.28厘米,面积多少平方厘米,直径多少厘米?
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(2π*R + 2R + R) = 9.28
R = 9.28/(2π + 3) = 9.28/9.28 = 1
S = πR^2 = 3.14cm^2
D = 2R = 2cm
2π*R + 2R + R) = 9.28
R = 9.28/(2π + 3) = 9.28/9.28 = 1
S = πR^2 = 3.14cm^2
D = 2R = 2cm
同鄙视
(2π*R + 2R + R) = 9.28
R = 9.28/(2π + 3) = 9.28/9.28 = 1
S = πR^2 = 3.14cm^2
D = 2R = 2cm