Question

if the length of a diognal of a square is 20 cm then it's perimeter is​

Answer 1

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Diagonal of the square= 20cm

Diagonal of a square = √2 × side

so side = diagonal ÷ √2

side = 20÷ √2

side = 10√2

No permiter of the sqaure = 4×side

permeter= 4×10√2 = 40√2cm^2

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