Squares
2d shapes that do not have equal sides do not usually have special names.
There are infinitely many 2d shapes. They can have 1 side (a circle or ellipse) to infinitely many. They can have sides that are straight or not, the sides can be equal or unequal in length, the angles can be equal or unequal, etc.
rectangle
No
Squares
isoceles triandle, square
Square and rhombus.
The Correct Answer is Irregular
rhombus
Polygon
a irregular polygon and rhombus