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## Question

primary 5 | Maths
| Area & Volume

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Realise that the horizontal parts of the perimeter on either side of the figure (top and bottom) add up to 3 sides of a square.

Another way to solve this :

First, find out the total perimeter of these squares if they are not joined together.

Then, observe the figure. Find out how many sides of a square are being blocked from the outside (the sides that do not form the perimeter)

Subtract the sum of the from the total perimeter

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