This resource is for KS4 students. It consists of a lesson presentation and a worksheet.

Students start by finding the perimeter of a semi-circle and a quarter-circle. There is an exercise requiring students to find the radius of curved sides. Students then find the perimeter of more complex shapes by identifying separate sides, finding the length of each side curved or straight and adding the lengths to find the perimeter of shapes with curved sides. Worked solutions to the worksheet are included.