Polygon-5
This is a fun, hands-on cross between analytical geometry (grade 10) and vectors (grade 12) . For this session I bring a large supply of plastic straws (cut to equal lengths) and pipe cleaners for the 90° bends.
The Question:
For which N is there a polygon in 3-space with N equal sides and all angles 90°? [Math. Mag. 55, p. 47, 1982]
