Equation of a Circle

Second Quarter Exam 2015 - Math Grade 10 / Second Quarter Exam 2015 - Grade 10 Math

Sample Question

Which of the following is an equation of a circle in the center-radius form?

  • [%x^2+y^2-4x+10y+20=0%]
  • [%(x+3)^2=-10(y-1)%]
  • [%\displaystyle\frac{x^2}{4}+\frac{y^2}{1}=1%]
  • [%(x-3)^2+(y+2)^2=81%]

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