10
9
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....
12
There are infinitely many such rectangles.
Assuming that you have to use all the rectangles, you have a few options:1x453x155x9Therefore, you are able to make three different rectangles.
As many as there are different rectangles.
10
You can make three rectangles. Remember that a square can also be a rectangle.5x14x23x3
3
9
Assuming the 12 squares are the same size, three. And three more if you count different orientations (swapping length and breadth) as different rectangles.
13
Infinite amounts.
There are many different quadrilaterals such as squares, trapezoids, rectangles, rhombus and parallelogram.
No not all rectangles are similar because the proportions are different.
3 or 6, depending on whether rectangles rotated through 90 degrees are counted as different. The rectangles are 1x12, 2x6 3x4 and their rotated versions: 4x3, 6x2 and 12x1.