Loyd's Two-Greek-Crosses-to-a-Square Dissection
This Demonstration illustrates Loyd's two Greek crosses to a square dissection. Samuel Loyd (1841–1911) created a multitude of chess and mathematical puzzles, including many dissections.
Sam Loyd (1841-1911) was the best known American puzzle composer. He published mathematical puzzle columns in variety of magazines. The best of his mathematical puzzles were collected into Loyd's Cyclopedia of Puzzles [Frederickson 2002, p.73].
G. N. Frederickson, Dissections: Plane & Fancy, New York: Cambridge University Press, 1997, 2002 p. 22.