OpenStudy (anonymous):

If the center is (-2,1) and a point on the circle is (2,7) put it in standard form.

5 years ago
OpenStudy (cwrw238):

genaneral form of circle is (x - a)^2 + (y - b)^2 = r^2 where (a,b) is the centre and r = radius

5 years ago
OpenStudy (cwrw238):

you know the centre, and the radius is the length of the line joining the centre (-2,1) and the point (2,7)

5 years ago