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Year 5 · Measurement

Perimeter of rectangles

Perimeter is the distance all the way around the outside of a shape.

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How to do it

  1. Write down the length of every side.
  2. Add them all up.

Worked example

A rectangle 5 cm by 3 cm
5 + 3 + 5 + 3
Perimeter = 16 cm

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A rectangle has four sides, not two.

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