A geometry problem over a century old has just found its definitive answer. Mathematicians have confirmed that the solution ...

a well-known fractal pattern. Sierpiński triangle is formed by repeatedly cutting out smaller equilateral triangles from a ...

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

Then he cuts little equilateral triangles out of food. He’s getting the hang of this isn’t he? Triangles are lots of fun to play around with. Look at all the patterns he’s making.

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 interior angles in a triangle always add up to 180º. An equilateral triangle has 3 sides of equal length. The dashes on the lines show they are equal in length. All of the angles are also equal.