Which statement must be true? . 1.) if a parallelogram is not a rectangle, then it is not a square. 2.) if a parallelogram is not a square, then it is not a rectangle. 3.) all rectangles are squares. 4.) if a parallelogram is a rectangle, then it is a square.

1) False.parallelogram is not a rectangle but a rectangle is considered a special case of a parallelogram
2) False :Quadrilaterals are four-sided polygons. All rectangles are quadrilaterals.
3.) False.All rectangles are not squares.
4) True. A square is a parallelogram with four congruent sides and four right angles.

How many groups are there?