In this lesson, you constructed the nets of three-dimensional figures, and you used nets to help you calculate the surface area for those figures.

Surface area is important in fields such as chemistry. Crystal structures, which are frequently geometric shapes, determine the chemical and physical properties of different substances. The surface area of a crystal can affect erosion rates or chemical reaction rates.

hexagonal prism with a net

Nets can also be used to derive surface area formulas.

surface area formulas for prisms, cylinders, and pyramids