16 - four in each !
two, squares and rectangles
14
6 shapes. There are the 4 long rectangles and 2 squares or smaller rectangles.
None they're all squares.
Assuming the 12 squares are the same size, three. And three more if you count different orientations (swapping length and breadth) as different rectangles.
two, squares and rectangles
Certain quadrilaterals have right angles. Right trapezoids are the most general example. Rectangles are specialized right trapezoids, and squares are specialized rectangles. There may be more but I can't recall them. Many rhombuses and parallelograms have no right angles. However, they might (and then you'd probably call them squares or rectangles but they are also technically rhombuses, parallelograms and trapezoids).
Generally, there are no right angles in a parallelogram, but rectangles and squares can be seen as special parallelograms, as they have all the qualities needed to be classed as parallelograms, and in addition, they have four right angles.
8
A square has 4 interior right angles; 2 squares therefore have 8 angles.
28
6,538.3
4 Right angles Per square... so 192 Right angles.
i don,t know
You could make 5 rectangles with 10 squares
Rectangles and squares both have 4 corners.
4 rectangles