7.2 A British tangram 227
7.2 A British tangram
The seven pieces of the puzzle can be fitted together as shown in the
figure to make a perfect square. All sloping lines are at 45 ◦, and the lines
which intersect the outer square do so at the midpoints of the sides. Find
all ways of making a rectangle using all of these pieces.^3
(^3) Singmaster, Problem 267,Journal of Recreational Math., 6 (1973) 152–153.