Question 92596
Since it's hard to tell where the triangle lies, I'm going to assume that the the line segments labeled "5" and "3" originate from the center. This means that the radius is 5 units. So if this assumption is correct (it may not be), then the radius is also equal to {{{3+y}}} (which is the total length of the horizontal line segment). 


Since the radius is {{{3+y}}} and 5 units, this means they are equal like this:


{{{3+y=5}}} Set the radius measures equal to each other


{{{y=2}}} Subtract 3 from both sides



So y is 2 units. Remember, I'm assuming that these lengths make up the radii. If this assumption is incorrect, let me know.