Circumference (length around the circle) = 3.1416 * diameter
(length across the circle)
If his circumference is 6' (13 squares at 1/2 foot per square,
minus 1/2 foot for the overlap, gives 6'), then his cages are
6'/3.1416 = a little less than 2' across.
If he cut them the same and then rolled them up the other
way (so that they would be taller), they would only be 4-1/2'
in circumference, and they would only be about 17" across
the circle (which probably seems a little tight and could
lead to broken branches with fruit hanging outside the cage).
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