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
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.
If it is nine feet by nine feet, then it is 81 square feet.
16 if there is no wastage or cutting.
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