Question

the diagonal of a rhombus are 8cm and 5cm . Find the side

Answer 1

consider AC  as a side (a)
$a= \frac{ \sqrt{p^2+ q^{2} }}{2}$
p= diagnol=8cm
q=diagnol=5cm 
(root 8 square) + (root 5 square)
------------------------------------------
                        2

= 64+25
 -------------
      2
= 89
  ------
    2  
=44·5