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$$x^2+y^2+4x-2y=-1$$
The equation of a circle in the xy-plane is shown above. What is the radius of the circle?
If a circle is given by the equation \(x^2+y^2+10x-4y=20\), what is the diameter of this circle?
$$x^2-10x+y^2+24y=1$$
The equation above defines a circle in the xy-plane. What are the coordinates of the center of the circle?
$$x^2+8x+y^2-6y=39$$
The equation above represents a circle in the xy-plane. What is the area of this circle?
$$x^2+2x+y^2-12y=-28$$
The equation of a circle in the xy-plane is shown above. Which of the following points is inside of the circle?