dthe equation of the circle whose centre is (-2, 4) and radius is 9 – InterviewSolution

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1.

dthe equation of the circle whose centre is (-2, 4) and radius is 9

Answer»

The equation of a circle with center (h,k) and radius r is: r²=(x−h)²+(y−k)²

9² = (x+2)²+(y-4)²

(x+2)²+(y-4)² = 81

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