Question

find the area of a rhombus whose one side measures 20 cm and one diagonal is 24 cm

Answer 1

area of ∆ made by diagonal in rhombus
two sides=20m
20m
and diagonal 24 m
semiperimeter =32 m

hence area of ∆ by hero's formula
√[32(32-20)*(32-20)*(32-24)]
√[32*12*12*8]
=12*16
=192 m²

hence rhombus area =2∆
=192*2=384 m²