Lateral area's formula is that the S side is equal to Ch and 2πrh. The definition of lateral area is that the area of the side development diagram of three-dimensional graphics is different from the bottom area, the size of the side of the object or the surface of the closed graphics, which is called their lateral area. Geometrical figures involving side area include cuboids, cubes, cones, right cylinders and prisms.

Transverse area generalization

The side areas of cuboids and cubes depend on their arrangement. Usually, the total areas of the front, back, left and right sides of a cuboid and a cube are called their side areas. The four sides of a cuboid are generally rectangular, and there may be two opposite sides that are square, and all four sides of a cube are square.

The side area of right-angle prism is defined as the quantity describing the side size of right-angle prism and its calculation formula. The sum of the side areas of a regular prism is called the side area of a regular prism, and the area of its side development diagram is its side area. The side development diagram of the cone is a fan, the radius of which is equal to the generatrix length of the cone, and the arc length is equal to the circumference of the bottom surface of the cone.