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 ...

"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.

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).

TOKYO -- A Japan-U.S. research team on March 10 offered a mathematical proof that "Dudeney's dissection," a challenge to cut an equilateral triangle and use the parts to create a square with the ...

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?