it is four sided shape
No, a Pentagon has five sides, a Quadrilateral has four.
Any 4 sided shape is a quadrilateral which includes a rectangle
A kite is only a regular shape if it is also a square or rectangle.
Trapazoid
A nine sided nonagon is only a regular shape if it has 9 equal sides
A 6 sided hexagon is only a regular shape if it has 6 equal sides otherwise it is an irregular shape.
square
A regular polygon must have all its sides equal and all its angles equal. The only regular quadrilateral is a square.
No. Quadrilaterals have four sides and triangles have only three!
A hexagon is a six-sided polygon that can be a regular or an irregular shape.
In general, a diamond shape is neither a square nor a regular polygon. Only in an extreme form is it a square and therefore a regular polygon.