Easel Floor Mirror Black

Q: i am thinking of getting this mirror...
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A: You will find some really nice mirror on these below sites:
http://www.spacify.com/bedroom_mirrors-4 56-175_5_5.html ...

Easel Floor Mirror – Black

A 6′ tall man is standing 5′ away from a 2′ long plane mirror hung with its bottom edge 4′ from the floor. How much of his image can the man see, assuming his eyes are at the top of his head. If the man moves to a point 10′ from the mirror and the mirror stays in place, how much of himself can he see? Do you mean 2 feet high?

So the top of the mirror is at head height (6′) and the bottom is 4′.

So the man can see himself down to 2 feet: 6 – 2 * (6-4)

He can see the same amount of himself at any distance.

I can’t really describe a general method for doing these except to draw a complete picture with the man and the mirror and draw in the light rays.