A simple rectangular room 20 feet by 18 feet has 360 square feet.
360 square feet. Multiply the length by the width. The result is the area in square feet.
There are 225 square feet in a 15 by 15 room
If the room is 10ft by 12ft, the room should be 120 square feet.
A room that is 12 feet by 13 feet is 156 square feet in area
16' x 15' = 240 square feet.
240 square feet
150 square feet
117 square feet.
108 square feet
525 square feet.
256 square feet.
162 square feet.
352 square feet.
96 square feet.
300 square feet
160 square feet.
324 square feet.
238 square feet.
770 square feet.
120 square feet.
252 square feet.
130 square feet.
96 square feet.
192 square feet.