What is the circumference x^2+y^2-2x-6y-15=0 ?

The circumference x^2+y^2-2x-6y-15=0 is C=10pi

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circumference x^2+y^2-2x-6y-15=0

circumference

x^{2} + y^{2} - 2 x - 6 y - 15 = 0

C = 10 π

Solution steps

C = 2 π r

Find the radius

Radius given

x^{2} + y^{2} - 2 x - 6 y - 15 = 0 : r = 5

C = 2 π 5

Refine

C = 10 π

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

x^{2} + y^{2} + 12 x - 12 y + 36 = 0

+ x^{2} + y^{2} + 8 x + 4 y - 3 = 40

x^{2} + y^{2} = 81

y^{2} = 4 - x^{2}

What is the circumference x^2+y^2-2x-6y-15=0 ?
The circumference x^2+y^2-2x-6y-15=0 is C=10pi