A square and a rectangle, a circle and a triangle. BOY: If you’re looking for a square, you can see them everywhere. Images of the shapes appear as they are mentioned in the song. BOY ...

W hen most people think of shapes, they imagine a triangle, a rectangle, or maybe even a fancier- sounding rhombus or ...

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

Why? Drag the vertices to create different quads. Is it possible to make a square that is not also a rectangle? A diamond that is not also a parallelogram? Why? Move the shape of the peaks to create ...