Perimeter and Area - Measure Perimeter - Worksheet

The lesson on measuring perimeter delves into the calculation of the perimeter of composite rectilinear shapes, using both centimetres and metres. Students are provided with differentiated worksheets and teaching slides to aid their learning. They are tasked to measure the perimeter of rectilinear shapes from diagrams that do not include grids, honing their measurement skills and the precision required to obtain accurate results. The lesson encourages students to explore different methods for calculating the perimeter of rectangles, such as adding all side lengths or using the formula (length + width) × 2.

Key questions posed during the lesson include understanding the definition of a shape's perimeter, identifying similarities and differences among shapes, and determining whether all sides need to be measured to calculate the perimeter. Students are expected to continue practising perimeter measurement using rulers and to measure to the nearest centimetre or millimetre, depending on the complexity of the shapes. The lesson also incorporates reasoning and problem-solving exercises, where students might, for example, construct a shape with a specified perimeter using regular hexagons, thereby applying their understanding of perimeter in a creative and practical context.