The answer depends on the units of measurement used for the numbers in the question: feet, metres, centimetres, miles, etc.
90
Assuming 9x9 is also in feet, then answer is 81 square feet.
141.75
If it is nine feet by nine feet, then it is 81 square feet.
16 if there is no wastage or cutting.
To find the square feet of a room with a perimeter of 36 feet, we first need to determine the dimensions of the room. Since the perimeter of a rectangle is calculated by adding the lengths of all four sides, we can set up the equation 2l + 2w = 36, where l is the length and w is the width of the room. Solving for one variable in terms of the other, we get l = 18 - w. To find the square feet, we then multiply the length and width: Area = l * w = (18 - w) * w = 18w - w^2.
To turn a 9x9 square into an octagon you can cut corners off the square. It will not be a regular octagon though.
81
Each tile covers 81 square inches. You have 1,296 square inches to cover. It will take 16 tiles to cover that area.
81 (9x9) & 9 (3x3)
A 9x9 foot slab 4 inches thick requires a minimum of 1 cubic yard. If you go to 6 inches thick you will need 1.5 cubic yards.
9x9=81