bases of a prism
bases de un prisma
the two identical, parallel faces of a prism; their shape gives the prism its name.
Example
A triangular prism has two triangle bases and three rectangle side faces.
In Spanish
bases de un prisma — las dos caras idénticas y paralelas de un prisma; su forma le da nombre al prisma.
Un prisma triangular tiene dos bases triangulares y tres caras laterales rectangulares.