Side A
Side B
Side C
Side D
diagonal e (A, B)
Find Area
Find Other diagonal f
Find sum (e + f)
Find difference (e-f)
Find product (e*f)
Find ratio (e : f)

                  We have used Bretschneider's formula for calculating the second diagonal .


                 where 4 consecutive sides a,b,c,d and diagonal e enclosing sides a and b are given.