Now, more than 122 years after it was first proposed, Kamata and two other mathematicians have finally proved that a solution ...

Mathematicians struggled to find the fewest number of pieces needed to cut an equilateral triangle and rearrange it into a perfect square. The problem, known as “Dudeney’s dissection” or the ...

Use a pen and ruler to draw over the vertical lines and join the dots, giving you a square. Image caption ... you now have a regular equilateral triangle.

Circle, triangle, and square. They’re simple, geometric, and eerily familiar. They look like something pulled straight out of ...