Find the side surface of the parallelepiped if the sides of the base are 5 cm and 8 cm, and the height of the prism is 12 cm.

All faces of a parallelepiped are parallelograms, the area of each face can be found as the product of the side length and height. The lateral surface area is equal to the sum of the areas of the four lateral faces. It can be calculated by multiplying the height of the prism by the perimeter of the base:
S side = P * h = 2 * (5 + 8) * 12 = 312 cm2.