96 rectangles.
seven
60
45, including those whose sides run at an angle to the grid lines.
It is not possible to answer in terms of a grid that cannot be seen, but a normal grid of 2 squares x 2 squares will have 5 squares.
Squares are actually also rectangles so you could make 8 rectangles without touching any of the squares. However, if you could cut the squares, that would be a different problem....
4 rectangles
90
14
9
seven
60
None they're all squares.
24 sqares in a gris 4x6
There are 2025 rectangles in a 9x9 grid.
That depends on how big the rectangles are.
Including squares, 1296.
45, including those whose sides run at an angle to the grid lines.