Question

if the length of the diagonal of a square is 20 cm find its area perimeter​

Answer 1

Answer:

let ABCD is a square we know that the all side of a square is equal and perpendicular each angle

let the sides of the triangle be x

by Pythagoras theorem

AC square is equal to ab square + BC square

20 ka whole square is equal to tu tu X ka whole square + X ka whole square

400 is equal to 2 x square

200 equal to x square

x is equal to✓200

x is equal to 14.1 45 CM

now,

the perimeter of the square is equal to 4 into the sides

4*14.145=198.030 centimetre