Enhance children's learning around perimeter by downloading this lovely Year 4 Calculate Perimeter of a Rectilinear Shape Reasoning and Problem Solving worksheet. This resource has been created to help children develop their understanding of perimeter through rectilinear shapes. Our worksheet contains three questions with two versions of each which allow children the chance to consolidate their understanding. Each question also includes the visual representation of the rectilinear shape. An answer page has been included too.