All of them are.
It is NOT as case of 'Some'. It is ALL rectangles are parallelograms.
All rectangles are parallelograms, so yes there are some.
No. Only some parallelograms are rectangles. But all rectangles are parallelograms.
Some parallelograms are rectangles; all rectangles are parallelograms.
false
True
Yes.
yes, it is true
Some of them (rectangles) do.
Yes
yes
Yes, all rectangles are parallelograms. However, not all parallelograms are rectangles.