“All squares have four sides.”

Which of these is a logically equivalent statement?
Answer
A figure is a square if it has four sides.
All figures with four sides are squares.
If a figure is not a square, it does not have four sides.
If a figure does not have four sides, it is not a square.

Question

“All squares have four sides.”
 
Which of these is a logically equivalent statement?
Answer
		A figure is a square if it has four sides.
		All figures with four sides are squares.
		If a figure is not a square, it does not have four sides.
		If a figure does not have four sides, it is not a square.

anonymous · Answer

thanks

parthkohli · Answer

If a figure does not have four sides, it is not a square.