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Posted by Denis Borris on 23/6/2009, 3:38 am
7 circles radius r.
1 of them is tangent to the other 6.
Them circles are inside a rectangle: 2 sides of
the rectangle are each tangent to 1 circle, the
other 2 sides are each tangent to 2 circles.
d = diagonal of the rectangle.
What's r in terms of d ?
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