sir please explain why do we need the height of mirror half of the the height of the object to see full image?

 

in triangle GHE,object dist=image dist,and mirror is parallel to the person , so from BPT th,

EF=FH..................1

in triangle ECA, AD=DC

BD is parallel to person, so EB=BCfrom BPT theorem,....2

For triangle,CEH,

EB=BC

EF=FH

so FB is parallae to HC and FB=1/2 HC