Q. 64.0( 20 Votes )

Find the side and

Answer :

In a square of side say a cm, any diagonal divide the square into two right triangles of equal dimensions.

Thus a2 + a2 = 102                                    

2a2 = 100

a2 = 50

a = 5 cm

perimeter = 4a

= 4×5

= 20

Perimeter of square = 20cm

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