Question

find the area of that rhombus whose each side is 40 cm

Answer 1

diagonal of rhombus = 40root 2
area of rhombus = 1/2 ×40 root2 ×40 root 2
=1/2 ×1600×2
= 1/2 ×3200
=1600

Answer 2

all sides of rhombus are equal therefore its area be equal to the area of square and area of square is side^2
side of rhombus is 40 cm
Area=40^2
=40*40
= 1600
=1600cm^2

Area of rhombus is 1600 cm^2