Do you want a fun way to have your students work on the Engineering Design Process and their Mathematics at the same time? Look no further! This worksheet makes students draw a possible solution of which K’Nex are needed to create an octagon. If students create their design, they may need to adjust their drawling. From here, students will measure their octagons. After the design process is over, students will complete perimeter questions about octagons on the back of the sheet. As an extension or homework, there is a constructed response dealing with the perimeter of an octagon. This can be a 1-2 day lesson. Differentiation included in the form of a tracer sheet.