If the room is supposedly a rectangle, then you can measure each diagonal. If the diagonals are equal, then all 4 corners are 90° angles. See the diychatroom link that I'm posting. It tells how to figure out which corner isn't a right angle.
You calculate the square feet of the room/ area. A square feet is still a square feet, no matter on the dimension of the tile
Measure your room, make a line in the center of the room (both ways) with a chalk line. Start laying it!
121 However if you are laying tile you need to account for waste add 10%. so 133 sq ft
The standard tile measure used for determining the dimensions of a room is square feet.
To lay out tile effectively for a professional finish, start by measuring the area and planning the layout. Use spacers to ensure even spacing between tiles. Begin laying tiles from the center of the room and work outward. Use a level to ensure tiles are straight and a tile cutter to make precise cuts. Finish by grouting and sealing the tiles for a polished look.
125 square feet.
The best place to start in a room when laying carpet tiles is the corner. Pick a corner and start there and then work your way out. Usually you want to pick the corner furthest away from the door.
You are asking for the square footage of this room, as a 12x12 tile is 1 square foot. 16x12=192 tiles Generally speaking any installer will also want 10% extra to account for any breaks. Also if you are laying the tile in a pattern it will up the amount of wasted materials. It is also good to have a few left over for future use.
160 of them.
11 feet (132 inches).
Each tile is 1 square foot.
Generally you would put the trim on after the tile is done. Especially if you are laying ceramic tile and need a mud base or cement board. If the room connects to another without tile, I would do the trim first. For example, the kitchen has tile and it flows directly to the dining room that has wood down and won't be replaced. If you put the trim down after the tile, the trim in the kitchen will be at least 3/4" taller then the dining room. This is only an issue when you have a really open floor plan.