Skills, knowledge & understanding
Work out the perimeter of simple shapes, e.g. rectangle, equilateral triangle
- Know that perimeter is the boundary of a shape
- Know that perimeter is measured in units of length
- Understand that the measurements required to calculate the length of the perimeter depend on the shape
Activities & examples
SfL curriculum activites
- Discuss the meaning of perimeter and its use in practical contexts.
- Find the perimeter of shapes in different ways, e.g. for large shapes such as a room or garden use pacing, a trundle wheel, metre stick or measuring tape; for smaller shapes use a piece of string, a 30cm or metre rule.
- Discuss ways of finding the perimeter of a rectangular shape – (by measuring two sides) and derive a simple formula in words. Use the formula to check the perimeters of some of the shapes that have been found previously.
- Investigate simple shapes with the same perimeter (e.g. a rectangle and a square), or rectangles with the same area but different perimeters.
Other curriculum elements
The following elements may also be useful:
Resources on other websites
The resources below are on external websites.