Perimeter and area (Images included)

Hi guys,

I received the following task, And I was suppose to determine the amount of tiles, of 200m by 200m, are needed to cover the space. I pulled this from the memo, because I don't quite understand the question itself with the steps that were done.

Could someone please break it down for me and explain it:

This is the space I am working with:

http://i50.tinypic.com/2hdqys7.jpg

This is the steps and answers:

http://i50.tinypic.com/jhgcg6.jpg

Thanks!!

Re: Perimeter and area (Images included)

The area of the blue and the white square together is Area_{big} which is the length of the base (29m) times the length of the height (16m).

The area of just the white square together is Area_{small} which is the length of the base (25m) times the length of the height (12m).

e the Taksmall area away from the big area and you are left with just the blue area

Dividing the blue area by the area of one tile gives the number of tiles needed to cover the area.