Question

Diagonal of a square is 18 cm. Find its perimeter and area

Answer 1

diagonal =side root 2

= side = 18/root 2 = 9 root 2

so, perimeter = 4xside = 4 × 9 root 2

= 36 root 2 cm

and, area = side^2

= 9 root2^2 = 81×2 = 162 cm^2

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