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

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

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.

You'll test the stability of a triangle and a square by standing them on a table and pressing on them. The one that changes shape less is more stable. 1. With your partner, build a triangle and a ...