Question
Find the center and the radius of the circle. Then graph the circle by hand. Check your graph with a graphing calculator.$$x^{2}+y^{2}=81$$
Step 1
Step 1: The general equation of a circle is given by $(x-h)^{2}+(y-k)^{2}=r^{2}$ where $(h,k)$ is the center of the circle and $r$ is the radius of the circle. Show more…
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