# Circle Equation: Center (h,k)

Explore the interactive activity and answer the questions that appear below the applet.

Suppose

*P(x,y)*= any point that lies on a circle with center (h,k) and radius*r*, where*r*> 0.*Use what you've observed to write an equation that expresses the relationship among**x*,*y*, and*r*. (No need to square any binomial expressions!)## New Resources

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