This method for counting lattice octagons strengthens students' counting skills and geometrical thinking.

Contributor Notes

Harold Reiter,, teaches mathematics at the University of North Carolina Charlotte.

Arthur Holshouser, who lives in Charlotte, North Carolina, likes solving mathematics problems for ten hours per day.

Patrick Vennebush,, is the online projects manager at NCTM in Reston, Virginia.

(Corresponding author is Reiter
(Corresponding author is Vennebush
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