Students will use the volume and surface area formulas they know, to find the volume and surface area of composite figures. Students will see problems where one figure is combined with another, as well as problems where one figure has been removed from another. As an example of the former, a right rectangular prism with a rounded edge. As an example of the latter, a right rectangular prism with a hole drilled through.

Lesson and practice: Volume of composite figures by Khan Academy

Conclude by giving your students these challenges:

- Length of an elastic band around 3 circles by MindYourDecisions
- Seven Pots of Plants by NRICH
- Factoring Factorials by NRICH
- Crossed Ends by NRICH