Practice: Equation of a Circle

Write the equation of the circle of center (8,4) and radius 9.

  • A(𝑥8)+(𝑦4)=9
  • B(𝑥+8)+(𝑦+4)=9
  • C(𝑥+8)+(𝑦+4)=81
  • D(𝑥8)+(𝑦4)=81

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