Yes, of course.
A non equal sided polygon is called a quadrilateral, or quadrangle.
All the sides are not equal
It is a non-equilateral polygon. It will, therefore, be an irregular polygon. However, it may or may not be non-equiangular. For example, it is possible to construct polygons with 5 or more sides such that no two sides are the same but such that all the angles are equal.
Not all polygons are regular by definition. An irregular polygon may have non-congruent sides or non congruent angles or both. A regular polygon will always have both congruent sides and angles.
A regular polygon is a polygon whose sides are equal length and whose angles are all the same value. A non regular polygon is just the opposite of a regular polygon.
A non regular or irregular polygon is a polygon whose sides are not all the same length
A [non-right] trapezium.
a polygon in which the sides are not all the same length
All the sides of a regular polygon have the same length. If two or more sides of a polygon have different lengths, then the polygon is not regular.
A circle is NOT a polygon, because a polygon is composed of straight line segments, and a polygon DOES NOT have rounded sides. BUT! I read this on the internet, that SOMETIMES a circle is considered a polygon with infinite number of sides.
Such a quadrangle cannot exist. The right angle must be formed by one of the parallel sides and one of the non-parallel sides. Then the angle formed at the other end of that non-parallel side would also be a right angle (the non-parallel side would be a transversal intercepting the two parallels). But then the quadrangle has two right angles, and not just one. No its Trapezoid
A polygon is an enclosed plane area whose boundaries comprise straight lines.A regular polygon is one in which all the sides are of the same length and all the angles are of the same measure.An irregular polygon is one which is not regular. It may have one or more sides that are not the same length as other sides, or one or more angles that are not the same measure as other angles (or both).