Because there are 4 sides of the polygon.
An equilateral polygon is a polygon where the length of all the sides of the polygon are the same length.
A regular polygon has equal sides in length and angles.
The perimeter of a polygon is the sum of the length of each of its sides. If the polygon is a regular polygon the you can calculate the perimeter as [number of sides] *[the length of one side]
A polygon with sides of equal length and equal angles is termed a regular polygon.
A regular polygon
A regular polygon.
A regular polygon requires all sides to be the same length; in a rectangle not all four sides are the same length (they form two pairs of sides of equal length) and so it is not a regular polygon.
a regular polygon
A regular polygon.
A rhombus is a quadrilateral polygon with four sides of all equal length.
Add the length of all sides. A regular polygon is a polygon where all sides and angles are congruent, so a shortcut is to know the length of one side and multiply it by the number of sides.
a polygon with 4 right angles and 4 sides of the same length