None.
It is a square that fits the given description.
Rhombus
A rectangle.
One of the properties of a square is that it's interior angles are all 90 degrees- or right angles. Squares therefore have 4 right-angles.
All quadrilateral polygons have 4 sides and 4 inside angles such as a square, a rectangle, a rhombus, a parallelogram ... etc
The 4 interior angles of a regular polygon with 4 sides which is a square each measures 90 degrees
4sides
Polygon
Rectangle.
It is a four sided quadrilateral as for example a square
If you turn a square 45 degrees the Corners get cut off making 4 extra sides. 4sides + 4sides makes 8 sides. this makes an octagon