However, depending on the context, you might also use:
* Cantos (for sharp edges)
* Filos (for cutting edges)
* Aristas (for geometric edges)
* Lados (for sides of a polygon)
Here are some examples:
* Los bordes de la mesa son redondeados. (The edges of the table are rounded.)
* Ten cuidado con los cantos afilados. (Be careful of the sharp edges.)
* El cuchillo tiene un filo muy afilado. (The knife has a very sharp edge.)
* Las aristas de la pirámide son rectas. (The edges of the pyramid are straight.)
* El cuadrado tiene cuatro lados iguales. (The square has four equal sides.)