Pentagon
The pentagon.
The pentagon
pentagon
an irregular polygon is a polygon that is the opposite of a regular polygon in a regular polygon the sides are the same and the angles are the same and irregular is the opposite.
A polygon with all sides and angles the same is called a "regular polygon."
It is called a regular polygon.
The question is not sufficiently well defined: the answer depends on same as WHAT! A polygon with the same sides and angle measurements as the corresponding sides and angles of another polygon is a congruent polygon. A polygon in which all the sides are the same length and all the angles are of equal measure is a regular polygon.
A triangle is a polygon. An equilateral triangle is one in which all the sides are the same and all the angles are the same. Then it is a regular polygon.
An equilateral polygon is a polygon where the length of all the sides of the polygon are the same length.
A polygon that all sides and angles are the same measurement is a regular polygon.
This is the definition of a "regular" polygon.