# Question #327ab

Jul 18, 2016

I found: $90 c m$ and probably his sister will not be able to see her shoes...I think!

#### Explanation:

I considered the law of reflection (angle of incidence equal to angle of reflection) and some geometry to get:

The distances are:
$a$ from top of the head to eyes;
$b$ from eyes to shoes.

....I didn't use the distance from the mirror....!