Q : 8  ABCD is a rectangle in which diagonal AC bisects  as well as 
. Show that: diagonal BD bisects 
 as well as 
.
 
                
                  
In  ADB,
AD = AB (ABCD is a square)
 5=
7.................1(angles opposite to equal sides are equal )
 5=
8.................2 (alternate angles)
From 1 and 2, we have
  7=
8.................3
  and  7 =
6.................4(alternate angles)
From 1 and 4, we get
  5=
6.................5
Hence, from 3 and 5, diagonal BD bisects angles B as well as angle D.