Answer:
361 1-ft square tiles.
Explanation:
The area of the room is a square. It has the same length on each side.
To find how many square tiles you need to cover the floor of the room you need to find the area.
Squares are easy to find the area of because you only need to multiply both sides by each other.
19x19=361
To multiply easier, you can 19 by 10 which equals 190.
Then you can add.
190+190
100+100=200
90+90=180
200+180=380
380-19=361