Question

if the length of a diagonal of a square is 20 cm , find
side of the square
perimeter of a square

Answer 1

Step-by-step explanation:

Let the side of square be X cm

Now, by applying Pythagorean theorem ,

we observe that ,

x^2+x^2=(20)^2

2x^2=400

x^2=200

x=10√2cm

Therefore, side of the square is 10√2cm

Now, we know that ,

perimeter of square is 4x side

4x10√2

=40√2cm

Therefore, perimeter of the square is 50√2 cms.

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Answer 2

Answer:

SIDE  =10

PERIMETRE =40

Step-by-step explanation:

1) WE KNOW THAT SQUARE SIDE ARE EQUAL ,SO USING PHYTHOGORUS THEORUM ITS SIDE WILL BE 10 CM

2) PERIMETRE OF SQUARE = 4* SIDE =4*10=40