What is the circle, find Circumference, given r=2x-4 ?

The circle, find Circumference, given r=2x-4 is C=2pi(2x-4)

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circle, find Circumference, given r=2x-4

circle, find Circumference, given r=2x-4

C = 2 π (2 x - 4)

Solution steps

C = 2 π r

r = 2 x - 4

C = 2 π (2 x - 4)

x^{2} + y^{2} - 2 x + 4 y - 21 = 0

(x + 2)^{2} + y^{2} = 25

9 x^{2} + 9 y^{2} - 6 x - 2 y - 17 = 0

x^{2} + y^{2} + 8 x - 4 y + 4 = 0

(x + 1)^{2} + (y + 1)^{2} = 13

What is the circle, find Circumference, given r=2x-4 ?
The circle, find Circumference, given r=2x-4 is C=2pi(2x-4)