No, only those rectangles that are squares have four congruent sides.
Rectangles
Rectangular prism
Some of them (rectangles) do.
Square and Rectangle
yes rectangles are congruent.
No, only those rectangles that are squares have four congruent sides.
Yes, into infinitely many sets of congruent rectangles. In fact, all plane shapes - including totally random ones - can be divided into sets of congruent shapes.
No, rectangles do not have congruent sides. Squares have congruent sides.
They make two congruent rectangles, not to rectangles! This is because the line joining the midpoints of opposite sides are lines of [reflective] symmetry.
Rectangles
No.
Rectangles have all angles congruent,
They're sides may not be congruent.
A hexagonal prism.
Rectangular prism
Some of them (rectangles) do.