Answer :
The 4 sides of a square are usually the same and the side length of squares 4 and 5 is a+b.
How to explain the square?
From the diagram, each side is called the side length. Therefore,
- Side length of square 4 = a + b
- Side length of square 5 = a + b
If the side lengths are equal that is (a + b), then the area which is the square of the side length will also be the same.
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