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The Journal of the Indian Mathematical Society, Vol 3, No 4 (1911), Pagination: 151-152
Abstract
The construction given by Mr. Sundara Row for an equilateral triangle by paper-folding is as follows : (page 10, ยง25, of the American Edition, 1901): " Take a line AB. Bisect it perpendicularly by a line CD. On the bisector take a point D so that AD=AB. Then ADB is the equilateral triangle."