SOLUTION: find the equation of a circle with center at (-4,2) and tangent to the line 2x-y+2=0

Question 938729: find the equation of a circle with center at (-4,2) and tangent to the line 2x-y+2=0
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!
Circle:
tangent to...
y = 2x + 2
...
Line perpendicular thru C(-4,2)
y - 2 = (-1/2)(x + 4)
y = (-1/2)x
...
(-1/2)x = 2x + 2
-2 = (5/2)x
(-4/5) = x and y = 2/5
...
C(-4,2)
(-4/5, 2/5)
r^2 =
...
r^2 = = 320/25

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