A circle has a radius of the square root of 45 and is centered at -2.4,-4.8. Write the equation of this circle

Question

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Answer 1

The standard equation of a circle is:

 

(x-h)² + (y-k)² = r²  where r is the radius, and (h,k) is the center, so

 

(x- -2.4)² + (y - - 4.8)² = sqrt(45)²

 

(x+2.4)² + (y+4.8)² = 45