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

Contributor Notes

Harold Reiter, hbreiter@uncc.edu, 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, pvennebush@nctm.org, is the online projects manager at NCTM in Reston, Virginia.

(Corresponding author is Reiter hbreiter@uncc.edu)
(Corresponding author is Vennebush pvennebush@nctm.org)
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