# Circles

(a) Consider the circle: (x+2)squared + (y-1)squared =9.

Find the center and radius of the circle.

(b) Consider the circles:

x squared + y squared + 4x-4y-1=0

x squared + y squared -2x+4y-4=0

(i) Find the center of each circle.

(ii) Find the distance between the centers if the circles are plotted on

the same rectangular coordinate axes.

https://brainmass.com/math/circles/find-center-radius-circles-13736

#### Solution Summary

This solution shows how to find center and radius of circles.

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