If you are drawing a venn diagram with only two circles of equal radius
overlapping, the distance between the centers is a direct (but thorny)
function of the common proportion you wish to display. You can come very
close with the following formula:
y = 3.5179*x^4 - 8.1729*x^3 + 6.8236*x^2 - 4.1096*x + 1.9692
where y is the distance between the centers in terms of proportion of the
radius and x is the desired proportion in common.
Dr. Terry Froman
Miami-Dade Public Schools
[EMAIL PROTECTED]
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