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Question

Using the following infornation determine the correct equation of a circle in a standard form

 

center: (2,-1)

Radius:(square root)3

Answer 1

The general form of a circle is

 

(x - h)² + (y - k)² = r²

 

where:

(h, k) is the centerpoint

r = radius

 

Then the equation for this circle is

 

(x - 2)² + (y + 1)² = 3