Orchard Visibility Problem (original) (raw)
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A tree is planted at each lattice point in a circular orchard which has center at the origin and radius 
. If the radius of trees exceeds 
units, one is unable to see out of the orchard in any direction. However, if the radii of the trees are 
, one can see out at certain angles.
See also
Euclid's Orchard, Lattice Point, Orchard-Planting Problem,Visible Point
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References
Honsberger, R. "The Orchard Problem." Ch. 4 in Mathematical Gems I. Washington, DC: Math. Assoc. Amer., pp. 43-52, 1973.
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Cite this as:
Weisstein, Eric W. "Orchard Visibility Problem." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/OrchardVisibilityProblem.html