Congruent means they have the same angles and side lenghts.
All squares have the same angles (all at 90*) but not all the same side lenghts; a square can be 5x5x5x5 and another can be 6x6x6x6.
Rectangles (including squares) have four congruent right angles.
Congruant
An angle bisector
It is a regular polygon.
Yes, all Squares are rectangles, but not all rectangles are squares because it needs to have all equal sides.
No, rectangles are not squares
Yes all squares are parallelograms but not all parallelograms are squares.
Yes, all squares are rhombi (aka rhombuses), but all rhombi are not squares.
No but all squares are a rectangles
no, but all squares are rectangles
All squares are rhombi
All rhombuses are NOT squares.