Properties of prisms: parallel planes

A prism is a 3D shape with two identical ends and all flat sides. Its cross section is the same all along its length and always the same shape as its ends. The shape of the prism’s ends gives the prism its name (for example, the ends of a hexagonal prism are hexagons). Prisms have parallel planes, which means that they have faces that are parallel to each other (they always stay the same distance apart and will never meet).