You want to see how your new belt buckle matches your new hat. Your eyes are 128 mm below the top of the hat and 800 mm above the buckle. You walk up to your mirror and notice that the mirror is exactly large enough and exactly in the right position for you see both the top of the hat and the buckle.
What is the position of the top edge of the mirror relative to your eyes?
How tall is the mirror?
the position of the top edge... View the full answer