irregular
It is classed as an irregular polygon when it has unequal sides.
It is a dodecagon. While it is irregular, so is a dodecagon with equal sides but unequal angles, so "irregular" is not enough.
A regular polygon has equal angles AND sides.
quadrilateral
An irregular nonagon
There is no specific name for a four-sided polygon with unequal sides.
A polygon whose sides are unequal is called an irregular polygon. It may then be further described as being concave or convex.
"What polygon has 5 unequal sides?" An irregular pentagon is a polygon that has 5 unequal sides.
It is classed as an irregular polygon when it has unequal sides.
A polygon with four unequal sides is a quadrilateral. A polygon with five sides is a pentagon. The polygon with the least number of sides is the triangle.
Quadrilateral
A polygon whose sides are not equal is known as an irregular polygon. A regular polygon has equal sides and angles.
The polygon with four unequal sides is known as a trapezium. Outside of North America is called a general irregular quadrilateral.
It is a dodecagon. While it is irregular, so is a dodecagon with equal sides but unequal angles, so "irregular" is not enough.
Rhombus
a quadrilateral trapezoidA polygon with four unequal sides is a quadrilateral, as is a square, rectangle, trapezoid and parallelogram.
A quadrilateral