0
It must be 0.
Every rectangle can be flexed into a different parallelogram by altering one of its angles to an angle in the range (0, 90). Therefore there are infinitely many parallelograms corresponding to each rectangle. That is, the ratio for each rectangle is 1 : infinity, which is 0.
Therefore that the answer for all rectangles and parallelograms is also 1 : infinity = 0.
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Are all parrellelograms rectangles?
No. Only some parallelograms are rectangles. But all rectangles are parallelograms.
Are there some parallelograms that are rectangles?
All rectangles are parallelograms, so yes there are some.
Can a parallelogram also be a rectangle?
Some parallelograms are rectangles; all rectangles are parallelograms.
Is every property of parallelograms also a property of all rectangles?
Yes. All rectangles are also parallelograms, but not all parallelograms are rectangles.
Are all parallelograms and rectangles the same?
No. Rectangles are parallelograms with all right angles, while parallelograms just have 2 sets of parallel lines.
