The adjacent sides of a square are perpendicular.
The elaborate domed structure that we know as Saint Basil's Cathedral sits at the south end of Red Square. Links can be found below.
no
A square
Each side of the square has two sides adjacent to it. Ex. if you just look at only one side, the sides next to it are the adjacent sides, not the one opposite of it.
Adjacent corners of a square share one side. Opposite corners share no sides.
A square because a parallelogram has two parallel sides and have two adjacent right angles but a square and a rectangle have also a two adjacent right angles.
yes
No but a square does
Square .
Yes.
If all adjacent angles are congruent, it can only be a rectangle (or square).