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A circle with radius r is located in the first quadrant of the coordinate plane, so that it is tangent to both the x-axis and the y-axis. It is also tangent to the circle with center (3, 0) and radius 1. Find the sum of all possible values of r.

 May 16, 2022
 #1
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By the distance formula, the sum of all possible values of r is 6.

 May 16, 2022
 #2
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it wasnt 6

Guest May 17, 2022
 #3
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the answer was 8

 May 17, 2022
 #4
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Oh, you were right!  The answer was 6!

Guest May 17, 2022

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