Rectangle
A square is a rectangle, a rhombus, an equilateral parallelogram, and a regular quadrilateral.
A quadrilateral has four sides, and the fact that it is equilateral means the sides all have the same length, so the only possible shapes with four sides of equal length are a square and a rhombus.
A rhombus is any equilateral ( all four sides congruent) quadrilateral. If it has right angle for the vertices then it is a rectangle called a square.
You could call it a regular quadrilateral, or an equilateral rectangle or even an equiangular rhombus, if you prefer.
A rectangle
Not necissarily. Quadrilateral simply says it has 4 sides. A rectangle has perpendicular sides. Equilateral means that the sides are of equal length (like a square, which is a special case rectangle)
A rectangle.
Rectangle
A square is an equilateral rectangle or an equiangular rhombus or a regular quadrilateral.
A square is a rectangle, a rhombus, an equilateral parallelogram, and a regular quadrilateral.
A rectangle comes to mind. A rectangle is equiangular (all angles the same) and is also a quadrilateral (four-sided), but is not equilateral (all sides of the same length).
square, rectangle, quadrilateral, polygon, parallelogram, equilateral
A square and rectangle all fit this description.
A quadrilateral has four sides, and the fact that it is equilateral means the sides all have the same length, so the only possible shapes with four sides of equal length are a square and a rhombus.
A rhombus is any equilateral ( all four sides congruent) quadrilateral. If it has right angle for the vertices then it is a rectangle called a square.
You could call it a regular quadrilateral, or an equilateral rectangle or even an equiangular rhombus, if you prefer.