It is a quadrilateral
A rectangle is a plane figure with four straight sides and four right angles. Generally considered to have unequal adjacent sides to differ them from squares.
A quadrilateral is a closed plane figure with four straight sides.
A four sided figure with four equal sides and no right angles is a diamond, or a rhombus. If it had four right angles, it would be a square.
That's a rhombus. With an additional constraint on the angles, it's also a square.
It is a quadrilateral
It is a quadrilateral shape that has 4 sides
A plane figure having four sides and four angles
A rectangle is a plane figure with four straight sides and four right angles, esp. one with unequal adjacent sides. A square is a plane figure with four equal straight sides and four right angles. A rhombus is a parallelogram with opposite equal acute angles, opposite equal obtuse angles, and four equal sides.
equilateral parallelogram
A perfect square Four 90 degree angles and four equal sides
A square.
A quadrilateral is a plane figure bounded with four sides and consisting of four angles.
A rectangle is a plane figure with four straight sides and four right angles. Generally considered to have unequal adjacent sides to differ them from squares.
A quadrilateral is a closed plane figure with four straight sides.
A four sided figure with four equal sides and no right angles is a diamond, or a rhombus. If it had four right angles, it would be a square.
No plane figure has four vertices unless it has four sides.