## Surface Area

The boundary of three-dimensional objects consists of several two-dimensional shapes. The total area of these shapes is called the surface area of the object. It gives some idea of how large an object is, but now how much space it takes up. This is measured by volume, which we will discuss next. Watch this lecture series and complete the interactive exercises to practice calculating the surface area of rectangular prisms.

### Intro to nets of polyhedra

Source: Khan Academy, https://www.khanacademy.org/math/cc-sixth-grade-math/cc-6th-geometry-topic

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