Complete package of 3rd- through 8th grade worksheets about finding the perimeter of trapezoids. (Trapezium in the rest the world). Offers a range of activities, including the ability to calculate the perimeter of trapezoids using decimals and integers. You can print the worksheets in either word or geometrical format. Here are PDFs that can be used to calculate the length of the missing leg or parallel base. Practice simplifying algebraic expressions for finding the sides lengths of trapezoids. You can access a few of these worksheets free!