周长 (x-8)^2+(y-8)^2=16

解答

周长

(x - 8)^{2} + (y - 8)^{2} = 16

C = 8 π

求解步骤

C = 2 π r

求出半径

给定

(x - 8)^{2} + (y - 8)^{2} = 16

的圆半径:

r = 4

C = 2 π 4

整理后得

C = 8 π

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