experience I learned that my students knew how to find the perimeter
and given the perimeter, they could also find the missing side. But when
testing came, the shapes were unusual, awkward and just plain boring. A recipe for failure, but a skill they really need. I have created many perimeter and area resources and this worksheet is available for free at my blog. Use it for review, homework, group work or an assessment. I also explain an excellent tip to make sure they consistently get the exact number of sides. Visit my blog today to get this printable for your files.