Lesson objective: Practice finding the volume of non-rectangular prisms.

This lesson helps to build skill with finding volumes of prisms. Images of three-dimensional figures are used here because it supports understanding the properties of a three-dimensional figure from a two-dimensional image. This work develops students' understanding that volume of a three-dimensional figure is always a measure of the amount of space taken up by the figure.

Students engage in Mathematical Practice 7: (Look for and make use of structure) as they learn the importance of the area of the base of a prism when finding the volume.

**Key vocabulary:**

- base
- face
- height
- prism
- volume