Question

1. select the correct answer.

an irregular polygon is equiangular but not __ or but not equiangular, or neither equiangular nor __.

concave
equilateral
vertices
convex

Explanation:

An irregular polygon is defined by not meeting the criteria of a regular polygon. A regular polygon is both equiangular (all angles equal) and equilateral (all sides equal). So, an irregular polygon can be equiangular but not equilateral (like a rectangle which is a type of irregular polygon in the general polygon classification as regular polygons are a specific subset), or equilateral but not equiangular (like a rhombus), or neither. The other options - concave (a property related to the interior angles and the shape's "caved - in" nature), vertices (a part of a polygon, not a property in this context), and convex (a general property of polygons where all interior angles are less than 180 degrees) - do not fit the pattern of the definition related to the non - regularity based on angle and side equality.

Answer:

equilateral