Siri is lining a square tree with 1 in.² tiles the side length of the tree is 9 inches how many tiles does Sarah need

a square tree? Do you mean tray?

In any case, it will clearly take 9x9 tiles.

I wonder if her square tree also has square roots.

To calculate the number of tiles Sarah needs to line a square tree with 1 in² tiles, we need to determine the total area of the tree and divide it by the area of each tile.

In this case, the tree is a square with a side length of 9 inches. To find the area of the tree, we square the length by multiplying it by itself:

Area of the tree = side length * side length = 9 inches * 9 inches = 81 square inches.

Since each tile has an area of 1 in², we can find the number of tiles by dividing the total area of the tree by the area of each tile:

Number of tiles = Area of the tree / Area of each tile = 81 square inches / 1 in² = 81 tiles.

Therefore, Sarah would need 81 tiles to line the square tree.