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 ...

What it means is that in a right triangle (where one angle equals 90°), the sum of the squares of two sides equals the square of the hypotenuse (the longest side).

the English author and mathematician Henry Ernest Dudeney posed a puzzle: Can any equilateral triangle be cut into as few pieces as possible that will fit together to form a perfect square?

"Over a century later, we have finally solved Dudeney's puzzle by proving that the equilateral triangle and square have no common dissection with three or fewer polygonal pieces," says Prof.

"Over a century later, we have finally solved Dudeney's puzzle by proving that the equilateral triangle and square have no common dissection with three or fewer polygonal pieces," says Prof.