Question

the diagonals of a rhombus are 48cm and 20cm long. find the perimeter of the rhombus

Answer 1

P=4a
a=side=48
so,
P=4×48
⇒192
∴P=192

P=4a
a=20
so,
P=4×20
⇒80
∴p=20

Answer 2

48/2=24
20/2=10
apply pythagoras theorem to get the side 
which is 26cm
26*4=104 cm