Question

Please answer with explanation.

Answer 1

Solution:-

As we know that formula of Square is "4×side".

Here side is given 20cm in all sides and it means it is a square so now,

4×20= 80cm.

Perimeter of this square is 20 cm.

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More information:-

Formula of Perimeter "2×l+b"

Formula of square "4×side"

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Answer 2

Answer:

side of square=20cm

perimeter of square=4×side

4×20=80cm