Dudeney’s original solution for transforming an equilateral triangle into a perfect square through dissection involves only four pieces, a solution that has now been proved to be the optimal solution.

For over a century, a simple yet tricky math problem had continued to baffle experts. Mathematicians struggled to find the fewest number of pieces needed to cut an equilateral triangle and rearrange ...

Three-dimensional puzzle of an anatomical model that can be detailed about the structure of living organisms such as the heart and reproductive organs A new product of 3D anatomical puzzle which is ...

This dissection puzzle consists of four cardboard pieces of the same shape that fit together form a perfect square. Each piece describes and illustrates (identically on both sides) one feature of a ...

This dissection puzzle consists of five blue plastic pieces that can be arranged to form a square. It comes in a light green envelope with blue print. One mark on the envelope reads: KLM (/) ROYAL ...