A rectangle.
parallelegram is the name it is a rectangle that is sort of slanted
The name of the larger side of a rectangle is length
A rounded rectangle.
There is no such thing as an isosceles rectangle.
A rectangle or a parallelogram
Dihedral angle
A rectangle is a rectangle no matter its orientation, it does not need to be horizontal or vertical to be a rectangle, the term applies only to the internal angle of the corners which of course must be 90 degrees.
No, it's the other way round. A rectangle is always a parallelogram.
quadrilateral
parallelogram
the diagonal in a paralleogram is not equal but the diagonals in the rectangle are congruent this is because the opposite sides of a parallelogram and rectangle are same parallel to each other but the adjacent sides of a parallelogram is not perpendicular where as the adjacent sides of rectangle is perpendicular to each other.
It does not have a specific name.
Eight squares in a row form a rectangle. Or, you could have two rows of four, one on top of the other. That too is a rectangle.
a rectangle. it has four parallel sides each side is the same length as the one on the other side.
A rectangle does not have a slant height. It is therefore likely that the shape is something other than a rectangle. What it is, is unknown and so the question cannot be answered.
A coffer.