Dudeney's Dissection
A beautiful physical version of Dudeney's Dissection, where the 4 pieces are hinged, so that you can transform one shape into the other.
Henry Ernest Dudeney (1857-1930) was one of the greatest 19th century puzzlers, and in 1902 he posed a problem in his column in the newspaper The Weekly Dispatch. The problem was 'starting with an equilateral triangle, what is the minimum number of pieces you can cut the triangle into, so that the pieces can be rearranged into a square?'
Many readers wrote in, giving a solution that involved 5 pieces. However one person, a Mr C McElroy of Manchester, sent in a solution involving only 4 pieces. Interestingly, it appears that there is some doubt as to whether Henry Dudeney actually knew of the 4 piece solution at the time he wrote his original newspaper column! He subsequently included this problem in a book published in 1907 called The Canterbury Puzzles, where he called it the haberdasher's problem. However it is more commonly known as Dudeney's Dissection.
We are very pleased to be able to offer this beautiful physical version of Dudeney's Dissection, where the 4 pieces are hinged, so that you can transform one shape into the other. Created specially for us by a local engineering company, the 4 pieces are made on a CNC lathe from solid aluminium, which is subsequently anodized. The equilateral triangle has sides of length 15cm, while the square has sides of length 10cm. It is 9mm thick, and weighs about 250g.
Made in UK
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Shipping
We aim to ship orders within 48 hours.
For UK deliveries, we use DHL Parcel (UK) and EVRI.
For deliveries to Europe we offer a choice of DPD or DHL.
For deliveries outside Europe, we ship by DHL.
Our warehouse works Monday to Friday only. If we receive your order by 10am then we aim to ship the same day or the next day, depending on how busy the warehouse is. On the day your order ships, the warehouse will send you your tracking number by e-mail at 7pm UK time. The delivery time to reach you will depend on the shipping option you have chosen.
Returns
We will accept items that you wish to return, within 30 days of placing the order. You are responsible for the cost of shipping the item back to us, and it must be in saleable condition. We will refund you the cost of the item. Please let us know if you wish to return an item before you send it.
If the item is faulty, please let us know, and we will ship a replacement or refund your money, as you wish.
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