6.K. DUDENEY'S SQUARE TO TRIANGLE DISSECTION
Dudeney. Weekly Dispatch (6 Apr, 20 Apr, 4 May, 1902) all p. 13.
Dudeney. The haberdasher's puzzle. London Mag. 11 (No. 64) (Nov 1903) 441 & 443. (Issue with solution not found.)
Dudeney. Daily Mail (1 & 8 Feb 1905) both p. 7.
Dudeney. CP. 1907. Prob. 25: The haberdasher's puzzle, pp. 49 50 & 178 180.
Western Puzzle Works, 1926 Catalogue. No. 1712 -- unnamed, but shows both the square and the triangle. Apparently a four piece puzzle.
M. Adams. Puzzle Book. 1939. Prob. C.153: Squaring a triangle, pp. 162 & 189. Asserts that Dudeney's method works for any triangle, but his example is close to equilateral and I recall that this has been studied and only certain shapes will work??
Robert C. Yates. Geometrical Tools. (As: Tools; Baton Rouge, 1941); revised ed., Educational Publishers, St. Louis, 1949. Pp. 40-41. Extends to dissecting a quadrilateral to a specified triangle and gives a number of related problems.
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