A general quadrilateral: it has no specific name.
The general name for a plane shape with four sides is a quadrilateral.
In a 3D world with 6 sides it is a cube.
There is no specific name, except in the case of a triangle: scalene. You should not call it simply an irregular polygon, because a regular polygon implies that ALL sides are equal and ALL angles are equal. So a rhombus, where all four sides are equal, is still irregular.
The answer is irregular * * * * * That is not true. A rhombus is irregular but does have equal sides. Any shape with equal sides - other than an equilateral triangle - can be distorted so that its angles are not equal. That is enough to make it irregular, even though the sides remain of the same length. There is no specific name for such shapes.
A pyramid.
A general quadrilateral: it has no specific name.
If you meant a shape then it could be a square or a rhombus
The name of the shape is a quadrilateral.
The general name for a plane shape with four sides is a quadrilateral.
There is no name for such a figure. Quadrilaterals such as a trapezium or kite or even one with no equal sides can have a right angle.
It is usually a regular polygon that has equal sides.
If it has four equal sides, it is a parallelogram. If the angles are also equal, it would be a square.
Parallelogram is a quadrilateral with opposite sides both parallel and equal in length - commonly known as a rectangle.
Square. By definition, its sides must all be equal.
parallelogram
irregular