Question

Length of the sides of a square is 20 cm each. Find the length of its diagonal.​

Answer 1

Answer:

as the length of the square is 20cm

the formula for its diagonal is ✓2 a

there fore

1.414×20=28.28 pls mark it as brainliest

Answer 2

$\huge\red{\boxed{\blue{\mathcal{\overbrace{\underbrace{\fcolorbox{red}{black}{\underline{\red{★ANSWER★}}}}}}}}}$

Given :-

Diagonal of square = 20 cm.

We know that Area of Square =

1/2 × d²

= 1/2 × 20 × 20

= 10×20

= 200 cm².

Also, area = side²

So,

side = √area

side = √200

Side = 10√2 cm.

$\huge\boxed{\fcolorbox{black}{pink}{perimeter=4*side}}$

= 4 × 10√2

= 40√2 cm.

Hence the perimeter of the square is 40√2 cm.