MYSTERIES OF THE EQUILATERAL TRIANGLE - HIKARI Ltd

Chapter 4
Mathematical Recreations
The impact of the equilateral triangle is considerably extended if we broaden
our scope to include the rich field of Recreational Mathematics [273].
Figure 4.1: Greek Symbol Puzzle [210]
Recreation 1 (Sam Loyd’s Greek Symbol Puzzle [210]). Draw the Greek
symbol of Figure 4.1 in one continuous line making the fewest possible number
of turns (going over the same line as often as one wishes).
The displayed solution commences at A and terminates at B with segment
AB traced twice. It requires only 13 turns (14 strokes). If no segment is traced
twice then 14 turns are necessary and sufficient. This same puzzle appeared
in [87].
103