Question

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.

Answer 1

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.