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The points (-3, 2) and (-2, 3) lie on a circle whose center is on the x-axis. What is the radius of the circle?

 Nov 3, 2019

Standard equation of a circle


(x – h)2 + (y – k)2 = r2


With (h, k) being your center coordinates.


If a circle with a center is on the x-ais, then its k-value is zero.


So plugging in our two coordinates into the standard equation:








Can you solve from here?

 Nov 3, 2019

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