They're sides may not be congruent.
No.
No
yes rectangles are congruent.
No
Yes.
No.
No
if the sides of two rectangles are equal then they r congrunt
yes rectangles are congruent.
Rectangles do not have congruent lines. A square can always be called a rectangle. But a rectangle can't always be a square.
Yes, a square will always be congruent, but rectangles also can be squares too. This is where you choose whether or not it is or not.
Rectangular prism
Square and Rectangle
No
They make two congruent rectangles, not to rectangles! This is because the line joining the midpoints of opposite sides are lines of [reflective] symmetry.
In a quadrilateral, the diagonals are only congruent for rectangles (or squares, which is a special kind of rectangle). Note: they are not congruent for a Rhombus.
Yes.