Circle A has a radius of 2 and a center of (1,7). Circle B has a radius of 2 and a center of (8,1). If circle B is translated by <4,3>, does it overlap circle A? If not, what is the minimum distance between points on both circles?

1 Answer
Sep 3, 2016

Circle A has a radius of 2 and a center of (1,7)
Circle B has a radius of 2 and a center of (8,1)
if circle B is translated by <-4,3>, the center will be (4,4)

Explanation:

distance bewteen circle A (1,7) and circle B (4,4) from center to center is
=(41)2+(47)2=32+32
=9+9=18=9×2
=32=4.24
As circle A and Circle B each has a radius of 2, they do not overlap each other because 4.24 is greater than 2+2 =4 (the sum of the two radii)
the minimum distance between circle A and circle B is
=4.2422=0.24