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