Surface area
Surface area is the total area of all the outer parts of a 3D shape. For example, for a box, it's the total area you'd get if you unfolded all the sides flat.
Surface area is the total area of all the outer parts of a 3D shape. For example, for a box, it's the total area you'd get if you unfolded all the sides flat.
Everything is a system, and every system contains systerms.