When dealing with perimeter, how do you find the total if a piece is removed?

Question

For example, if a girl has an 8 1/2 by 11 in paper, and she cuts out a 3 by 3 square, what is the total perimeter now?

Answer 1

It depends on where the 3x3 square was cut out.
If cut out of a corner, then the total perimeter remains the same, 39".
If cut out of a side, such that a side of the cut out square is on one of the sides of the paper, it increases by 6", or 45"
If cut out of a side, such that a corner of the 3x3 piece is on one of the sides of the paper, it increases by 12", or 51"
see:
http://mudandmuck.com/str2/cutout.JPG

Also, I assume that she doesn't cut off a corner. But if she did, the perimeter could increase anywhere between 0" and (9-3√2)"

Answer 2

If she cut it from a corner, the same as before, 39"

If she cut it from a side and it didn't include a corner, she removed 3" from the previous perimeter and added 9" to it for a total of 45"

Answer 3

you subtract the total perimeter (8 1/2 x 11) minus the piece that was cut out.

Answer 4

the perimeter would be 33
(thats a corner)
i think you want the area though..for that find the areas of the paper, l x w x h in this case 8.5 x 11= 93.5 and then the 3 by 3 square wich is 9 and then subtract 93.5 - 9 = 84.5 is the area.

Answer 5

PERIMETER is the total of all side, all you need to do is add all the side up and you're done. if you want to try, cut a 3 by 3 square and add all the side up, if it is still 39 in, you got it

Answer 6

hi
the perimeter will not change, it will remain the same as before the girl cut the square. ( should be 187 using the firmula (2*length*breadth)
perimeter is the measure of the sum of the lengths of all the sides (or edges)

Answer 7

The perimeter would stay the same but your area would change from 93.5 to 84.5