An equiangular polygon is one in which all the angles are of the same measure. But the sides are not the same length. A simple example is a rectangle.An equilateral polygon is one in which all the sides are of the same length. But the angles are not of the same measure. A simple example is a rhombus (diamond).A regular polygon is one in which all the angles are of the same measure and the sides are of the same length. A simple example is a square.An equiangular triangle must be equilateral and conversely. So they must be regular. But, as illustrated by the examples above, polygons of 4 or more sides can be equiangular, equilateral or regular - or, of course, none of these.
A polygon is "regular" (or equilateral) if all its sides are the same length and all its angles are the same angle. While a rectangle has 4 right angles, it does not have 4 sides that are equal length so the answer is irregular.
a quadrilateral wow
Trapezoid
Any polygon that has 4 sides is a quadrilateral.
a polygon with 4 right angles and 4 sides of the same length
A square.
A quadrilateral
a quadrilateral
rhombus
A square.
a square
A square.
Square
a rectangle
square
A quadrilateral