MathsYears 4–5Measurement

Perimeter and area of rectangles

Measure and calculate the perimeter of a rectilinear figure; find area by counting squares

What you'll learn

  1. 1

    Imagine a rectangle drawn on the floor with chalk 🧑‍🎨. The perimeter is the distance all the way around the outside, like walking along the chalk line.

  2. 2

    What is the perimeter of a rectangle?

  3. 3

    Walk around this rectangle — add up the sides to find the perimeter.

  4. 4

    Let's find the perimeter of a rectangle that is 6 cm long and 4 cm wide.

  5. 5

    A rectangle has sides 7 cm and 2 cm. What is its perimeter?

  6. 6

    Now the area is the space INSIDE the rectangle, like the floor you can stand on 🟦. We count how many squares fit inside.

  7. 7

    Count the squares inside this 5 cm by 3 cm rectangle to find its area.

  8. 8

    What is the area of a 5 cm by 3 cm rectangle?

Practise Perimeter and area of rectangles with Whizlo

Free AI-tutored lessons, unlimited practice questions, and progress tracking for ages 8–10. Aligned to the UK National Curriculum.