Question

Perimeter of a square is 36 cm. Find the length of its diagonals.

Answer 1

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P=4a

a = 9

d=2a

Solving for d

d=2P

4=2·36

Therefore diagonal is 12.73

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Answer 2

Answer:

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Step-by-step explanation:

P = 4 × x

36 = 4 × x

x = 9

side = 9 cm

by pythagorous theoram ;

${y}^{2} = {x}^{2} + {x}^{2} \\ y = \sqrt{81 + 81} \\ y = \sqrt{162} \\ y = 12.7cm$