Question

Find perimeter of a square if it's diagonal is 10√2?​

Answer 1

let the side of the square be xcm.

by pythagoras theorem,x^2+x^2=(10root 2)^2

2x^2=200

so x^2=100

therefore x=10cm

perimeter of a square=4 × side = 4 × 10 = 40 cm

Answer 2

Answer:40

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