Question

if side of square is 20 cm then its diagonal is .......... cm

Answer 1

Answer:

20cm

diagonals are equal to the sides

Step-by-step explanation:

Answer 2

Answer:

Step-by-step explanation:

side =20cm

diagonal forms 2 right angled triangles

height=base=20cm

diagonal=hypoteneuse

by pythagoreous theorem:-

$hypoteneues^{2} = 20^{2}+20^{2} \\hypoteneous^2 =400+400\\hypotenoues^2=800\\hypoteneus^2=\sqrt{800} \\hypoteneus=28.28cm$