## Find Surface Area Using Nets

## Work Time

# Find Surface Area Using Nets

The top and bottom faces of a prism are the bases. The remaining faces are the lateral faces. Notice that the lateral faces form one large rectangle. This rectangle is called the *lateral surface*.

Use the Prism Net interactive to explore the net of a rectangular prism. Notice that as you change the net, the faces of the prism adjust accordingly.

- How do you think the perimeter of the base and the length of the lateral surface are related?
- Why do you think the perimeter of the base and the length of the lateral surface are related in this way?
- How could you find the area of the lateral surface?
- Based on your observations about lateral surface area, describe a method for finding the surface area of a rectangular prism.

INTERACTIVE: Prism Net

## Hint:

- What are the width and length of the lateral surface, and how could you use those measurements to find the area of the lateral surface?