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Given: A(2,1), B(0,5), C(-1,2), AB and BC, center point (1,3) and r=√5.

Find the equation of the circle.


Sagot :

Answer:

Below in bold.

Step-by-step explanation:

To find an equation of a circle we need the length of the radius and the coordinates of the centre.

The general form is (x - j)^2 + (y - k)^2 = r^2    where (j, k) is the centre and r is the radius.

So our equation is:

(x - 1)^2 + (y - 3)^2 = (√5)^2

(x - 1)^2 + (y - 3)^2 =  5.