A shape with no sides next to each other would be a one sided shape, ie, a circle.
because each side depends on each other for stability
Rectangle
Right angles!
That they do not tessellate with each other
Lots of ovals overlapping each other to create the sunflower's shape.
Trapezoid.
They are said to be congruent to each other.
You need to be in shape and be able to each other how to get in shape. It is not for everyone.
A shape with no sides next to each other would be a one sided shape, ie, a circle.
because each side depends on each other for stability
Rectangle
Right angles!
That they do not tessellate with each other
Create? Neither can create the other. Shape or influence? Certainly. History shows that they borrow from each other and shape each other. The main religion in a culture typically supports the culture, just as the culture supports it; each accommodating the other.
2D shape
A parallelogram is any regular geometric shape in which two opposite sides are parallel to each other.