Jamey J.
asked • 09/13/13
Find an equation of the circle with center at (-4,5) that is tangent to the y-axis in the form of (x-A)^2+(y-B)^2=C where A,B,C are constant.
Robert J.
answered • 09/13/13
Certified High School AP Calculus and Physics Teacher
Since the circle is tangent to the y-axis, r = 4.
(x+4)^2 + (y-5)^2 = 16
Therefore,
A = -4, B = 5, C = 16
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