Are squares rectangles and parallelograms

Yes, squares are a specific type of rectangle and parallelogram. A rectangle is defined as a quadrilateral with four right angles, while a parallelogram has opposite sides that are equal and parallel. Since a square has all the properties of both rectangles and parallelograms—four right angles and equal sides—it fits into both categories. Thus, all squares are rectangles and parallelograms, but not all rectangles or parallelograms are squares.