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Oak National Academy
Oak National Academy
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Perimeter

Year 4 • Maths
We've put the lessons in order helping you build on what you've learned before so it’s best to start with the first lesson of a unit.

Choose a lesson (10)

1
Know that a regular polygon has sides that are the same length and angles that are the same size
2
Know that the perimeter is the distance around a 2D shape
3
Understand that different shapes can have the same perimeter
4
Know that perimeter is measured in units of length and can be found by counting or measuring units
5
Know that perimeter can be calculated by adding together the side lengths of a 2D shape
6
Know that the perimeter of a rectangle can be calculated by addition and multiplication
7
Know that unknown side lengths can be calculated from the perimeter and known side lengths
8
Understand that the perimeter of a regular polygon can be calculated by multiplication
9
Calculate the side length of a regular polygon by division where the perimeter is known
10
Solve problems involving the perimeter and side lengths of polygons