The center is (-1, -2) and the radius of the circle is 5.
<h3>What is the equation of a circle?</h3>The circle equation formula refers to the equation of a circle which represents the center-radius form of the circle.
A circle can be represented as;
Where; h and k are the center of the circle r is the radius of the circle.
The given equation of the circle is;
Comparing both the equations;
Hence, the center is (-1, -2) and the radius of the circle is 5.
Learn more about circle here;
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Answer Is Option a)4.5 sq.units
Given vertices are X(2,1),Y(5,4) and Z(5,1)
Answer is given above in the image
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