Let AB segment denoting the position of a woman.
AB=5′6′′
A(0,5′6′′) -point head position
B(0,0)- point leg position
E(0,Ey)-point eye position
CD segment indicating the position of the mirror
Let’s draw the bisector CT△ACE
СT is also the height of the triangle, therefore
Cy=Ay−2AE
Let’s draw the bisector DL△BDE
DL is also the height of the triangle, therefore
Dy=2BE
The maximum possible eye point is point A
then
Cy=Ay=5′6′′
Dy=2AB=2′′9′
CD=2′′9′
Answer: mirror length -2′′9′
mirror height above floor level - 2′′9′
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