Determine the standard form of the equation for the circle with center (h, k) = (0, - 2) and radius r=9

Question

Deja

Mathematics

24 June, 21:25

Determine the standard form of the equation for the circle with center (h, k) = (0, - 2) and radius r=9

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Answers (2)

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Big Mac · Answer 1

Equation of circle

(x-h) ^2 + (y-k) ^2=r^2

so lets put the values in,

h=0 and k=-2 and r=9

(x-0) ^2 + (y+2) ^2=81

x^2 + y^2 + 4y + 4 = 81

x^2 + y^2 + 4y = 77

that's your Answer.

Gavin Castro · Answer 2

(x-h) ^2 + (y-k) ^2=r^2

(x-0) ^2 + (y+2) ^2=9^2

x^2+y^2+4+4y=81

x^2+y^2+4y-81+4=0

x^2+y^2+4y-77=0