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24 September, 19:49

Write the equation of the circle: Center at P (2, - 1) and a diameter of 10m

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  1. 24 September, 23:19
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    An equation of the circle is

    (x-h) ² + (y-k) ² = r²,

    where (h, k) are coordinates of the center of the circle, and r is a radius of the circle.

    We have h=2, k = - 1, and radius r=diameter/2=10/2=5.

    The equation of our circle is

    (x-2) ² + (y+1) ²=25
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