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.

We know 3&4 are false because all rectangles are NOT squares.
#2 if a parallelogram is not a square that means it does not have four right angles and four congruent sides. It could have four right angles and not four congruent sides do it could be a rectangle.
#1 has to be false. In order to be a square it first must be a rectangle.

None liner bro because