Area is a measurement of size. We measure the area of a floor to find the amount of carpet needed to cover the floor. We can also use area to measure the amount of paper needed to wrap a present.

Area is the amount of surface that is needed to cover something. To measure the area of a shape, we tell the number of squares needed to cover the shape.

Professor Peabody has started to cover his living room and hall with square tiles. The living room is in the shape of an octagon. The hall is a rectangle.

Check-In: Questions 1–6

How many square floor tiles did Professor Peabody use to cover the hall?
Professor Peabody has covered half of his living room with tiles. These tiles have been counted for you. Why are the numbers 31 and 32 used twice?
How many square floor tiles will it take to cover the whole living room?
How many square floor tiles will Professor Peabody need to cover the hall and living room?