The standard form of a circle is plus equals the radius squared . The horizontal and vertical translations represent the center of the circle. The formula is derived from the distance formula where the distance between the center and every point on the circle is equal to the length of the radius.
Fill in the values of and which represent the center of the circle.
Fill in the value of which represents the radius of the circle.
Add and .
Simplify the right side of the equation.
Remove parentheses around .
Raise to the power of .