Question

find the area of rhombus with one diagonal of length 10cm and its perimeter is 40cm.

Answer 1

each side is equal
each side is of 10 cm
since,
diagonals are equal in a rhombus so,
each diagonal is of 10 cm

Answer 2

perimeter of rhombus= 4a
40=4a
a=40/4
a=10