Question

if the perimeter of a square is 40cm find the length of a diagonal and it's area ​

Answer 1

Answer:

Perimeter of the square=40 cm

Let the side be a

The perimeter of the square=40 cm

4a=40

a=10

Therefore the side of the square is 10 cm

Diagonal of the square

$=\sqrt{2 a^{2} } \\ =\sqrt{2 (10^{2}) } \\ =\sqrt{200} \\ =14.14 cm$

Area of the square = $a^{2}$

                                =100sq.cm

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Answer 2

Step-by-step explanation:

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