If they have the same area.
If two squares have the same side length for all sides, then they are congruent.
Yes
It depends on the type of squares your looking at, if the are exactly the same its congruent.
No. Most squares probably are not congruent. Although they are similar.
The word for the same in math is congruent. For example, if there are two squares, both the exact same size, length, width etc., then the two shapes are congruent.
Yes, if the perimeters are the same, then both of them have side = perimeter / 4. And of course the angles are all 90°, since they are squares.
Figures that have all sides congruent are squares. Congruent shapes have the same size and the same shape. Circles can be congruent if they have the same radius.
Yes.
Rectangular prism
Yes they are
Yes.
A equilateral triangle and a normal triangle.