2D shapes have sides and corners. A rectangle has 4 straight sides and 4 corners. A square is a special type of rectangle, where all 4 sides are the same length. Why not see how much you know ...

2D shapes have sides and corners. A rectangle has 4 straight sides and 4 corners. A square is a special type of rectangle, where all 4 sides are the same length. Why not see how much you know ...

A supposed square structure spotted on Mars sparked speculation about alien archeological sites on the red planet. It's a fun idea, but the reality is more mundane.

A new proof reveals the answer to the decades-old “moving sofa” problem. It highlights how even the simplest optimization ...

Square nails are extremely popular and characterised by straight flat tips and sharp, precise corners. This shape, when short, is perfect for anyone wanting a clean, minimalist look or those in a ...