An Equilateral (equi = equal, lateral = sides) triangle (tri = three).
Any regular shaped polygon has equal angles and equal sides
A hexagon has all six sides in equal length and all angles in equal measure.
A square is a four-sided shape with all sides equal and all angles equal.
No shape has four equal sides and four different angles - either there are two pairs of equal angles, or all four angles are the same; or all sides are not the same length.
Its a diamond :]
A rhombus
A rhombus.
The rectangle
square
The shape described is a parallelogram, specifically a rhombus. In a rhombus, opposite sides are equal in length, and opposite angles are equal. Additionally, none of its angles are 90 degrees, which differentiates it from rectangles and squares.
The shape you are describing is a rhombus. A rhombus has all four sides of equal length, opposite sides that are parallel, and opposite angles that are equal. When the diagonals of a rhombus are drawn, they intersect at right angles.
A rhombus has 4 sides of equal length, opposing parallel sides, and no right angles