a square and a rectangle
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square
The shape you are looking for is a quadrilateral. If you have a square, all angles MUST be right angles. A parallelogram can also have 4 equal sides in length and parallel sides, but a parallelogram doesn't have right angles.
A square has 4 right angles and 4 equal sides.Its relatives, the rhombus (has 4 equal sides, but not necessarily 4 right angles), the rectangle (4 right angles, but not necessarily 4 equal sides) are the closest as far as quadrilaterals are concerned.
Rhombus
A shape with four unequal sides is called an irregular quadrilateral.