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Algebra II Recipe: Writing an Equation of a Circle (When the Center and Radius are Given.)

By G Redden

Writing an equation
  1. Use .
  2. Substitute the values of the center in place of h and k.
  3. Substitute the value of the radius for r.
  4. Square both sides to eliminate the .
1.
Write the equation of the circle with center (-2,3) and radius equals 4.
2.
Write the equation of the circle with center (0,0) and radius equals
Algebra II Recipe: Writing an Equation of a Circle (When the Center and Radius are Given.) | AlgebraLab